Mr. McBroody Wayne is great, Superman kicks ass, but come on, there are only so many reboots, collaborations, and continuations we can take. To date, we've already had over 15 Batman and Superman films (not counting animated features) and WB has just announced, drum roll please, ANOTHER movie featuring the two.
Meanwhile, I'm weeping in a corner, because as cool as a combo movie sounds, we're missing out on a bunch of really cool characters from the DC canon, including Wonder Woman, who has yet to make a single big screen appearance.
I mean, studios have spent $994,000,000 producing 3 Batman and 2 Superman movies in the last 8 years. Give a fraction of that to a director who knows what they're doing, make a great film, and people will go and see it and ENJOY it.
Beloved character + good director/writers/budget + common sense (do the character justice) = HIT.