Letting JJ Abrams take a crack at Superman may not be the best call to make given the reception to his screenplays for an attempted reboot of the character in the early 00's. In his very first draft,
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Krypton does not explode, the reasoning to send Kal-El to Earth is based purely on politics as you see Jor-El is, or was,
king of the entire planet.
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Jor is overthrown by his backstabbing little brother and is
held in a prison, he is able to communicate with Kal-El telepathically. -Lara managed to escape her brother-in-law's take over and her bodyguard is an
anthropomorphic turtle.
-The main villain is Superman's evil cousin Ty-Zor,
they often engage in Matrix style hand-to-hand combat.
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Lex Luthor is actually a Kryptonian sleeper agent whose mission was to watch over Kal-El and keep tabs on Earth's defenses, he goes at it with Clark at the end and loses quickly.
-Superman leaves Earth in the ship that brought him there and sets off to Krypton to re
claim the throne from his uncle, that would've been the end of what was conceived of as the first part in a trilogy.
To be fair, Abrams was not as big a player in the industry then as he is today and he was going under what producer
Jon Peters wanted, and he was also writing for
McG and Brett Ratner who were both in contention to direct.