I recently read that the WB is planning to shoot Superman vs. Batman and Justice League back-to-back. Now of course it’s still just a rumor, but it gave me few ideas for way this could actually be very good.
So, I will first start with a theory for Man of Steel, and that theory will lead to the JL movie.
In Man of Steel we saw, a quick shoot of Superman in the scout spaceship, and we see few pods. In those pods there are skeletons, but one of the pods is open and empty.
Now, before Man of Steel was released, there was a short prequel Comic, that showed us how the scout spaceship ended up on Earth, and we also see there Kara Zor-El (Supergirl).
Me personally, I don’t want to see Supergirl in the cinematic universe. So I’m thinking, what if they ignore that prequel Comic, and do something different.
So the scout spaceship crashes in the Arctic long time ago. Few weeks before the events of “Man of Steel”, few LexCorp’s scientists scan the area, and find some strange signs. They find some Kryptonian Tec in the area. But before they can start digging in the area, the military arrives, and the scientists bail, taking the Tec with them.
Lex Luthor is fascinated by alien stuff, and so his scientists start testing the Tec that they have found.
Then, after the events of Man of Steel, Lex becomes paranoid, and tells the government that that must have a fail-safe against Superman.
And so, Lex gets his hands on more Kryptonian Tec, like the scout spaceship (that crushed in the city), the world engine, Zod’s armor and even Zod’s body (Superman did left Zod’s body just lying around and he didn’t really clean all the mess).
Lex then tells his people to do experiments on a man called John Corben, and after all the crazy tests, Corben becomes a hybrid of Metallo-Bizarro-Cyborg Superman and a little of Doomsday (though I would keep the real Doomsday for Man of Steel 3).
So, in Superman vs. Batman, the two heroes fight, then they join forces to stop Lex and “Metallo-Bizarro-Cyborg Superman”.
After a great climax, Superman fights and defeats “Metallo-Bizarro-Cyborg Superman”, and Batman and Lex have their own fight, and Batman kicks Lex’s ass.
In the end, Superman and Batman shake hands, and we get a great World's Finest movie ending.
But the movie doesn’t end with a happy note. We find out that while Lex has been playing with the Kryptonian Tec, he activated a secret beacon. That beacon transmits through the stars, and we end the movie in a very big ship, just flouting in space. We enter the ship, and then there is darkness. Suddenly three red lights turn on, and an alien with a green face opens his eyes. Brainiac is coming.
This leads us straight to the Justice League, with Superman, Batman, Wonder Woman, Flash, Green Lantern, Aquaman and maybe Martian Manhunter join forces to stop Brainiac.
Now after the JL movie, and with the DC cinematic universe is established, the WB can do origin story movies to their heroes, because this is something we all want to see.