re: Who can lead the DC Film Universe? Obvious Solution....

DC's problem is the tone set is awful. There isn't one bit of fun in any of these movies.

Part of any comic book movie's appeal is hitting the inner child in us that would really want to be these heroes; and Marvel does a good job with that. I can't think of any DC movie hero I'd want to be, based on what they have been going through. Batman (current version)- his mansion is decrepit, and he is angrier than a CNN newscaster the day after the elections.
Superman- everyone hates him, including himself.
Suicide Squad members- criminals in prison, forced to go on a suicide mission under threat of having their heads blown off, then return to prison after saving the world.

Maybe they change it up with Wonder Woman and she actually gets to smile... but I doubt it. The backstory to BvS seemed to have her writing off mankind for a century, so she's going to be miserable as well.

As 'entertaining' as the special abilities and extravagant effects are, we viewers would like to have a little bit of happiness in our escapist fantasies. What's the point of having super powers when all they bring you is super depression?