My friend watched this, and strongly urged me to do the same. He informed me that the Batman would freak me out.
I wasn't all that creeped out by the Batman; he seemed more sad and mouthy in a way which led me to believe strongly he was all talk. For example, he claimed to have been like, a hired assassin kinda deal, then it later showed him looking completely pathetic in a karate class.
The extremely delusional superman, however...
Wonder Woman was just kind of pathetic in a way that didn't really make me sympathize with her at all, and The Incredible Hulk actually seemed to be the kindest and most sane, although he was the only one who spent time in LA actually being homeless, I believe.
Still, kind of depressing. Aside from Wonder Woman, I kind of felt bad for the lot of them.
And, although pictured, Spider Man isn't really important in the movie at all. The main four are Superman, Batman, Wonder Woman, and The Incredible Hulk.