You know what I want?
I want a reversed version of injustice, where BATMAN is the one to snap and become a tyrant, and Superman is the good guy. Because Evil!Superman is always really out of character for me (though hot), but Batman is always one step away from the edge, and if he ever falls over - there’s a reason the Dark Knights of the Metal Crossover are so terrifying.
Just picture it though - the Joker does to Batman what he did to Superman in injustice canon, and Bruce watches as his city explodes, with his kids and Gordon and Alfred all in it. He snaps, and kills the Joker - and then he plans.
Because this can never happen again.
He uses his brain and detective skills to figure out who would be open to helping him run the world properly (which would be a great way to bring in Lex Luthor), instead of the mess it is now, and makes overtures - those of the Justice League that wouldn’t (like Superman) are sent away on a wild goose chase in space, and Batman takes control of all the technology and weapons in the world, and sets his people - and possibly robots? - in place as a police force. When the other members get back - well, he has ways, non-lethal but hard hitting, of taking them down until they can see that he’s doing the right thing, and join him (he has no doubt that once Superman stops looking at so betrayed, he will join him.)
Superman in a krptonite collar, silent and hurting, staring at Bruce with big, betrayed blue eyes - and you’re working with Luthor, Bruce, really? Luthor!? - and Batman always standing a little to close, staring a little to hard at Superman’s mouth...Bruce is finally going to get everything he ever wanted.
(For bonus points, Luthor ALSO creeps on Collared!Superman, because I am a multishipper, and also really like the mental image of them sharing him.)
Eventually, Superman gets away and starts an insurgency - but he can’t out-think Batman.
For that...he’d need another Batman...