Wow you went off on a left wing tangent there towards the end.
I have no problem with Aflek being the new Batman. Christian Bale just wouldn't have worked, Christopher Nolans world is just too real work into a superhero combined universe (If he'd made the Lazarus Pits real, it might have worked). That and the story has a pretty definitive ending. My main problem is with Superman. The new one just made too much of a mess to work as a foundation of a Marvel style Justice League. I don't even know what the source of this new Supermans powers are (is it the gravity, is it the air, the food, the sun, hope? I don't know) or what his weakness is if one even exists. The morals made no sense, Supermans personality seemed wrong, his secret identity is already blown, ext ext ext. The movie is an in cohesive pile of mush and it's supposed to be the corner stone?
Adding batman isn't going to help. It's like making the 2003 Hulk movie the corner stone of the avengers, making direct sequel to and trying to fix the issues by adding Iron Man rather than them making the first Iron Man movie the corner stone. They really just need to drop this superman movie in the Green Lantern bin, don't make it part of the Justice League continuity and start again with a different founder. If you don't want Batman again, do Wonder Woman or the Flash, then a re-re-reboot of superman, and batman, and maybe Green Lantern and more. They should all be stand alones with no big crossovers. Once you have 3 or 4 properties established on their own footings (keeping a bigger world in mind and referenced) then you can do crossovers and the big Justice league movie.