Audio problem: Before Flash takes the baby out of the microwave, it makes a ding sound as if the timer had ended, but the microwave is unplugged and not working at all as the scorched screen proves.
Continuity mistake: During the fight in the desert, after Flash creates a tornado, the background behind Flash-original-suit changes: the corpses lying on the ground change number and position, and several tanks suddenly appear everywhere.
Continuity mistake: In the Soviet bunker, Batman hooks a soldier taking cover at a distance. In the next shot he's suddenly closer and in range to kick him.
Continuity mistake: At the Russian lab, Flash stops a bullet from hitting Barry by tilting his head to our right. A shot later, not only is his head not tilted, but Flash's right hand swaps from resting on Barry's shoulder to grabbing his arm. Also, when the bullet flies by, Flash's left hand is suddenly lowered.
Continuity mistake: The Flash arrives at the past and sees his mom holding a glass of wine with her right hand. An instant cut later, she holds it with her left hand.
Continuity mistake: When Old Barry shows Young Barry how the ring works, his grip changes between shots, with his thumb covering the hole or not.
Continuity mistake: The way Young Barry holds the broccoli when feeding Old Barry changes between instant cuts.
Continuity mistake: Young Barry grabs the peanut butter and a spoon. Shot changes and now he has a broccoli in his hand, and the spoon is nowhere to be seen. After Old Barry eats the broccoli, we don't see Young's hand for a mere two seconds, and now the broccoli has vanished, and he holds the spoon instead.
Continuity mistake: When Young Barry dies, Old's hand and arm are covered in blood. Old stands up and suits up, and now his hand and arm are clean.
Continuity mistake: When Old Barry faces Dark Flash, Young Barry stands on the left side of the screen. Old Barry then turns to the right and cries, "Get out of here, Barry." But he's facing the wrong way.
Continuity mistake: When Old Barry is about to fight Dark Flash, Young Barry suddenly appears and Old Barry turns his head to our left and stares at him. However, a mere frame later, he is facing ahead. If you watch closely, his head is turning the opposite way, from right to left. (02:01:13)
Audio problem: When the world is collapsing, Dark Flash says, "I pushed you out of the chronobowl," but his mouth is not moving.
Continuity mistake: During the trial, after the lawyer proves Barry's father's innocence, the way father and son grab hands changes between shots.
Continuity mistake: When Kara wakes up in Bruce's mansion and meets the Barrys, the way the shroud on the table folds changes between shots.
Continuity mistake: When Young Barry is carrying Kara in his arm, the strands of hair over her cheek differ between the wide angles and the close-up.
Continuity mistake: Aquaman raises his right arm and says, "I'm the same guy," and points at his chest. A shot later, his arm is suddenly lowered.
Continuity mistake: Aquaman's scarf slides from his shoulder down to his arm. A shot later, it's back over his shoulder. It changes positions several times between shots.
Continuity mistake: When Barry talks to Aquaman about the Batman actors, one can see the top of the bottle he holds. A shot later, it's covered in paper.
Continuity mistake: When Barry grabs the bottle from Aquaman, he holds it from the upper part. A shot later, his grip is lower.
Continuity mistake: When Barry exits the bar with Aquaman, he grabs the flask with his left hand. A shot later, it's in his right hand.
Answer: Some possible reasons gleaned from the Internet: Filmmakers wanted a different vision of Supergirl to reflect a darker, grittier personality and to show her refugee-like experience. Her dark short hair symbolizes her harsher journey from her home world. Also, it gives her a more androgynous look, reflecting both her feminine and masculine traits. Those are all possible reasons, but adopting a radically different look for an established character generates more attention and interest in the film.
raywest ★