Question: Since it was possible to create a clone army, why were cybernetic parts given to Anakin, instead of cloning the limbs he lost and attaching them to his body?
Answer: Adding to what Phaneron, also note how long it would take to grow said limbs for a full adult. The clones themselves have growth acceleration so that they take half the time a normal person to reach full maturity and growth. But this still takes 10-15 years for the to get to physical adulthood. And their growth acceleration doesn't stop at that point. The reason why none of the Storm Troopers are Clones in the original trilogy, by the time New Hope rolls around, is because they age twice as fast. Most died of old age or were very old by that point as in that 17 year time gap between Episode 3 and 4, they aged 34 years physically, without the growth acceleration being stopped as it's likely not able to be stopped. So it would take a very long time to grow cloned limbs for Anakin and be physically a match for him. And if they did accelerate the growth for said limbs, it would only take a few years before he'd be a younger guy walking around with very old man legs and arms. Not to mention, the arms and legs wouldn't have his muscle mass grown by default without being used.
Question: Did General Grievous know Palpatine is Darth Sidious?
Answer: No. It was a well kept secret that only his apprentice knew.
Who is that apprentice?
Not only his apprentice knew. Maas Amedda and Sly Moore also knew.
Answer: First it was Darth Maul in Episode 1. Then in Episodes 2 and 3 it was Count Dooku.
Question: Why does Obi-Wan want to watch over Luke, but nobody needs to watch Leia?
Answer: Leia was placed into the care of a very wealthy family, and would be given protection 24/7. Luke, on the other hand, was placed into the care of a very secluded home and a poor family, with almost little to no protection from outside dangers. Luke would have been more at risk if the Empire found out who he was.
Answer: Incidentally, this question is kind of being addressed in the new Obi-Wan Kenobi series.
Question: Is this true that young Han Solo was originally supposed to appear in this movie?
Answer: There was strong talk of that happening. Lucas envisioned a ten-year-old Solo scrounging on Chewbacca's home planet. He was given only one line "I found part of a transmitter droid near the east bay. I think it's still sending and receiving signals." It would be revealed that Chewbacca raised Solo and taught how to fly ships. He was also to have met Yoda, but the idea got out of hand so it was scrapped.
Question: Why didn't Bail Organa have R2-D2's memory wiped?
Answer: R2-D2 isn't known for being a loud mouth like C-3P0 is. 3P0 is very likely to spit out valuable information or information about the Skywalker twins being born because that's just how he is. There isn't that danger with R2. Also R2 is an astromech mechanic. Most wouldn't think of him holding information like a protocol droid would.
Answer: This is because only C3PO knows the identity of Leia and Luke, since he was around Anakin and Padme whilst pregnant, and thus most likely knows it's a twin and the identity of the father, whilst R2D2 doesn't.
C-3PO could have easily told R2-D2 about Luke and Leia while thinking that he wouldn't say anything. I wouldn't say that R2-D2 was a blabbermouth but he did accidentally tell Luke about the private message for Obi-Wan in ANH.
Answer: R2-D2 is better capable of not revealing any secret information.
Question: Can someone enumerate to me who knew that Palpatine is Darth Sidious?
Answer: At the start of the movie the only people who knew are Dooku and others close to Palpatine. It's possible Grievous knew too, but we never get a confirmation. By the end of the movie all the remaining Jedi know, as well as Senator Organa and all the clone troops. The Senate doesn't.
It is said that in the film's official novelization, Grievous doesn't know Palpatine is Sidious.
Dooku, Maul, Maas Amedda, Sly Moore, Grand Moff Tarkin, and Ochi of Bestoon all knew.
Question: Why couldn't Darth Tyranus sense that he was going to be betrayed by Darth Sidious?
Answer: It has been established that Sidious knows the Force extremely well, if not better than anyone. Perhaps he was able to shield himself using the Force in a way that prevented Dooku from sensing he was going to betray him.
But Tyranus is powerful. Even Sidious feared him when he was a Jedi.
Question: Why exactly did Anakin say to Obi-wan "I hate you!"?
Answer: In Anakin's mind Kenobi betrayed Anakin by holding him back from his potential, by helping the Jedi attempt to overthrow Palpatine, and by manipulating Padme against him. This leads to a physical fight between the two wherein Kenobi severely maims Anakin, and as far as Anakin knows at the time would likely lead to his inevitable death. By this point he truly, passionately hates Obi-Wan Kenobi.
Question: This applies to the entire prequel trilogy. Can the Jedi (especially Jedi council) be considered anti-heroes? Or no? As a bevy of "protagonists", they sure have obvious shortcomings which leads to their downfall and in the end are not heroic in much sense at all.
Answer: I would argue that the Jedi cannot be considered antiheroes. A major characteristic of antiheroes is a lack of conventional morals, and they typically act in self-serving ways. For example, many antiheroes oppose the antagonist of a story for revenge rather than for the "greater good." The Jedi are presented as highly moral and indeed quite selfless. It is true the Jedi are flawed and their flaws lead to their downfall, but merely having flaws does not make you an antihero. Their actions fighting the Clone Wars were certainly heroic, even if they ultimately lead to Palpatine gaining more power.
Question: Here are a couple of questions: 1) Let's say Anakin let Mace Windu slay Chancellor Palpatine / Darth Sidious. If that happened, would Anakin have been kicked off the Jedi Council because Windu told Anakin to wait at the Jedi Temple and not interfere? 2) Would Anakin have been promoted to Jedi Master if he stayed behind and let Windu kill Palpatine? You would think that because prior to that Windu tells Anakin, "you will have gained my trust."
Answer: 1) It is unlikely given the situation that had Windu killed Palpatine, Anakin would be punished at all for defying Windu. It would only have helped Windu's case that he wasn't assassinating Palpatine because Anakin was now a witness. 2) Likely he would have been promoted, the darkness that surrounded Anakin and his unusual relationship with Palpatine is all that kept him from achieving the rank.
Question: If Aayla Secura's a Jedi Master then why does she wear a skimpy brown leather outfit? She should be dressed more like the other Jedi masters.
Answer: In-universe, it is the typical clothing of a Twi'lek female. Jedi are allowed to wear whatever clothing they want, though most choose the robes fitting the ascetic life of a Jedi.
Answer: Several possibilities. There are cultural differences in how the different races dress that may supersede the traditional Jedi uniform. However, and more likely, movies often sexualize women characters by dressing them in skimpy, skin-bearing costumes, even when it is out-of-sync with how others are dressed.
Answer: Going along with LorgSkyegon's answer, the clothing is common for female Twi'leks. Many Jedi observe a few traditions, customs, etc. of the worlds they came from. Since they are guardians of peace across the galaxy, they need to respect all cultures. It can be helpful for a Jedi to acknowledge their background, especially if they ever need to deal with a situation involving their species/homeworld.
Question: After the events of this movie, why does Darth Sidious call himself Emperor Palpatine? Vader was expected to ignore his old life as Anakin Skywalker. Or was that a personal choice of Vader's?
Answer: Anakin, renamed Darth Vader, is a choice by Palpatine/Sidious. It is a Sith name. Darth Sidious, however, has two roles to play as both a Sith Lord and occupying an official position as the Emperor, so he uses his real name for that. The rest of the universe cannot know him as Darth Sidious.
Question: I know one of the reasons Anakin slaughtered the younglings at the Jedi Temple is because he knew it would add to his power, but is there any other reason why?
Answer: He was instructed to eliminate all Jedi. Since the younglings were force sensitive and training to become Jedi, they were eliminated as well.
Question: Is Mace Windu more powerful than Yoda, considering he did defeat emperor Palpatine, which Yoda couldn't do?
Answer: Mace didn't actually defeat Palpatine. Palpatine was putting on a show for Anakin to gain sympathy and try to force Anakin's hand into turning on Mace to further propel him down the path of the Dark Side with no hope of return. At any point, Palpatine could have easily turned the tables on Mace and took him out, but he knew Anakin was coming. That's why he dispatched the other 3 Jedi so quickly so that they wouldn't be in the way, and knew that Mace would have the most impact on Anakin having the Jedi turn on the Master.
But Mace defeats Sidious fair and square.
Palpatine made it look that way. Because he knew Anakin was coming and wanted to see him in that predicament to gain more sympathy from him to act against Mace. Palpatine threw the fight, took a dive.
Regardless, What I'm asking is Mace stronger than Yoda consdiering that he defeats the Emperor regardless when Anakin intervened.
No, he is not stronger. Yoda's highly force sensitive blood is even mentioned in Episode 1 when they discover Anakin's blood. That "No Jedi has a count that high, not even master Yoda." Yoda is over 800 years old and a long time student of the Force, and of his species. Not to mention he even has such a high count in his blood in such a small body. Mace is basically just human.
Pretty much similar as to if Anakin is stronger than Yoda considering he beats Darth Tyranus. But in reality, Yoda is stronger than Anakin or Mace Windu.
I wouldn't say Yoda is stronger than Anakin... just far more experienced. Again, he's had 800 years to study and master the Force and expand upon himself. Anakin is still learning and only in his 20's. Also after his limbs are cut off and replaced by the mechanical parts when he becomes Vader, he's actually a lot weaker than he was since he lost so much of his precious blood.
I think Mace was closer to winning and had a great chance had Palpatine not devised his being weak plan as an afterthought after Anakin shows up while he doesn't have his lightsaber anymore.
It wasn't an afterthought. He was manipulating the situation from the get go, having the entire thing planned out and staged ready for the perfect timing of Anakin to walk in.
Sidious didn't plan on Anakin walking in right before he was killed. That would have been too close. He planned on beating the Jedi Masters and use their bodies as proof that the Jedi are traitors. That would have been enough for the council and Anakin. You have to understand that Mace Windu is the most skilled lightsaber duelist of all Jedi, far superior to Yoda. There is no way Sidious could have beaten him. Yoda on the other hand is the best force user of all Jedi, superior to even Luke. All in all Yoda is the most powerful Jedi that ever lived. Anakin Skywalker, especially after joining the dark side, the second most powerful. The fact his body was broken didn't weaken him, it only made him stronger. The reason Yoda didn't beat Tyranus or Sidious is because he is too compassionate, and getting older. Tyranus used that against him and Sidious, well, he just got lucky I think and Yoda gave up too quick. No sith besides Vader has surpassed Windu, Yoda or Obi-Wan.
Question: If Yoda's better than Darth Sidious then why couldn't he beat him?
Question: The Emperor tells Grievous to send the separatists to Mustafar so that Anakin can later kill them to quote "end this war" but why? Why not leave them with Grievous and have them be captured by Obi Wan? To add to that wasn't the war already over when Obi Wan killed Grievous? Wasn't that the whole point of sending Obi Wan to kill Grievous? Why bother killing them, the war is over, you'll have control of those systems back anyway.
Answer: His long-term plan still has to make it look like he's playing both sides. He must convince the Separatist leaders that he's trying to protect them and extend the war slightly until he gets Anakin completely on his side.
To add to that Grievous was in control of the armies, so he had to be killed so the armies would be disbanded, better to risk a Jedi for that task. Also the separatist leaders had to be killed eventually because they could disappear and come back with another army or ships. They had served their purpose, they had to go.
Question: Was Palpatine's Order 66 named in reference to FDR's infamous Executive Order 9066 - the order that authorized the Japanese internment camps? There are many other historical references in the Star Wars prequels (e.g. Palpatine being a "Chancellor," just like Hitler); could this perhaps be another example?
Answer: Perhaps, but unless George Lucas mentions this outright (he never does on the behind the scenes videos), its uncertain to say.
Question: How come Obi-Wan could use the force on Grevious but not the MagnaGuards?
Answer: He didn't have to on the MagnaGuards, he dropped something heavy on them and took them out. You might notice he was very close to Grievous when he used the force on him and needed time to focus his force push. Against the MagnaGuards that would just be inefficient. But he could if he needed, no droid is immune to the force.
Answer: To add to the above it is not just that he is missing arms and legs but his internal organs like lungs are incapable of working properly. So one would have to do more then just replace the arms and legs. In addition Palpatine make the suit vulnerable to force lighting making it harder for Vader to overthrow him as is the way of the Sith.