Who/What am I rooting for? A better story, and sincere and heartfelt writing...is that too much to ask for? Considering the characters involved, it really shouldn't be.
Heck, strangely enough, Captain America provided the perfect blueprint for how a Superman film could toe the line between a grim setting and a stalwart and hopeful hero with infectious optimism. I mean, if we are asking for good competition, lets have GOOD COMPETITION! But per the original question...probably Batman, the whole undying human spirit and power of the mind over insurmountable odds, etc etc...
Which is odd, when that's supposed to be what Superman embodies, for all his power. Ah well, still have to see the film. I expect more from it, but I'll take a "solid popcorn flick."