Re: What's next for Batman...
I do think that the risk associated with both ideas (returning to the Nolan-verse and bringing back The Joker) would be effectively and significantly minimized, though, by using the setup that Nolan provided to finally bring a variation of Batman Beyond to the screen.
I like this idea a lot. And they could keep the title because it would totally fit.
Whatever happens on earth, that up there, that's the endgame.