I think we are getting an Earth-One type story or something we NEVER expected.
With the main difference being that instead of that corpse painted alien dude, we are getting Zod, Ursa, and maybe Non.
Maybe Krypton did not blow up in this version, Brainiac conquered Krypton and Jor El sent Kal-El to earth to protect him from Brainiac's rule.
Clark is living amongst the humans until Brainiac sends an exploratory force, consisting of Zod, Non, and Ursa to prepare an invasion of earth, and he is forced to become Superman.
He remains torn between two worlds, Krypton (where he came from) and Earth (who he is), and not trusted by either.
So Superman would be as earth's defender from alien forces (even though he is one of them).