Fan CastingZach Snyder's Woman of Tomorrow

When Brainiac arrives on Earth Superman must work together with lex Luthor to stop him. Throughout the movie Brainiac's forces come in waves and take down most of Earth's military defenses. We cut to a flashback of the day Kal-El was sent to Earth and we see that after Kal was sent away so was his cousin Kara Zor-El who landed on a remaining chunk of Krypton where she doesn't age and didn't get any farther until about 40 years later when she managed to chart the rotation of a specific asteroid which she gets to hit her pod which sends her all the way to Earth where Superman and Earth's forces including the Martian Manhunter are trying to fight off Brainiac. After finding Kal-El she tells him of what happened but there isn't time for reunions so Kal-El heads to Brainiac's ship. Kara and Martian Manhunter follow and help Kal fight Brainiac. They manage to weaken Brainiac and capture him but after Kal and Martian Manhunter get off the ship the self-destruct system turns on and traps Kara in the ship. Kara knows the explosion could destroy Earth and so she flies the ship galaxies away and faces the explosion which kills her. The movie ends with Superman giving a speech to the United Nations about how to protect the country better. We cut to Lex Luthor who is in the back of the building on the phone with someone that sounds like Deathstroke.