The name is the least of this movie's troubles. I'm just concerned that they're not going to get the dynamic of Batman and Superman right. Being influenced by Frank fucking Miller is not what I want to see when it comes to Batman and Superman.
They're bros. They may disagree, but they share the same code, and when it comes down to it, they're going to be back to back, fighting the good fight. I worry that making the entire movie about Batman vs Superman will introduce too much animosity, and make any team up in Justice League ring false.
Man of Steel was already worrying in this regard, I hope they know what they're doing with this one.