Easter egg: When you insert any of the 6 movie DVDs in the Star Wars saga, once the FBI screen pops up (red in Episodes I, II, IV, V, VI; and blue in Episode III), enter a number between 1 and 3 (and press Enter if needed). Once the Star Wars logo and the Episode number disappears, a menu with the planet that you chose (and not what the DVD randomly chooses) will load.
Easter egg: In all the Star Wars movie discs, and the bonus materials discs with them, when the red screen with the big word "Attention" appears after the FBI screen, you can actually disable all the menu transitions by pressing 1 (and if needed, Enter) when it comes up.
Easter egg: On the 4th Bonus disc of the Star Wars Trilogy DVD set select the "VIDEO GAMES AND STILL GALLERIES" option. Type in 11 ENTER, 3 ENTER, 8 ENTER. A yellow box will appear behind R2-D2, Select it to watch DVD credits with Bloopers/Outtakes.
Answer: While planning Star Wars, Lucas had a vague notion of doing a long series of movies inspired by old serials, then dropped that idea in favor of just one. When Star Wars became a phenomenon and sequels became feasible, Lucas revisited the idea. He thought of three trilogies along with some stand-alone "in-between" stories for a total of 12 films. By the time of The Empire Strikes Back's release, this was pared down to the 9 mainline films, going by interviews with Lucas and the cast at the time. By Return of the Jedi, Lucas had decided to end the saga there, with the option that he could revisit the first three at some later point. It's unclear if Lucas ever had any specific story ideas for the proposed sequel trilogy, and they never had any scripts. Producer Gary Kurtz suggested in an interview they would've been about Luke's twin sister (not Leia), though many fans are skeptical about just how much he would know about them. Of course since this question was asked a sequel trilogy was written and released.
TonyPH