I like the new Superman. The first movie seemed under rated, from what I gathered. I didn't see it until it was on HBO's free preview weekend. It surprised me how much I liked it.
I like the darker Batman of late, but haven't been too fond of Christian Bale as Wayne/Batman. I still think the Batman IP could be much better. That said, I am not into the idea of Batman going all bad guy. I may have browsed through the comics of this, but I have no idea what the essential premise is. But the trailer made it seem like Batman loses his mind and, being a Batman fan, I would never consider this believable (right, I know, comic books, fantasy, peyote).
It could be a surprise, though.
Contrast this to the new Star Wars and the trailers so far...it looks like exactly what that IP needs. Darken it up, get rid of kitsch. The X-wing and Tie Fighter glimpses just do it for me.