For me, there is almost no way I'll enjoy BvS completely, less because of any writing failures that might happen, but they're just not doing what I particularly want. They're trying to emulate the machismoism of the Frank Miller Batman and the square offs we've seen from them is only a bunch of tough guy trashtalk about how the other sucks.
For me, the best Batman vs Superman fights are about how either of them would love to be doing anything else. Usually, that means one of them is being mind controlled somehow (typically Superman), but on a relationship level, seeing two friends fight is just more compelling to me than two guys who hate each others guts over mostly a misunderstanding (Superman thinks Batman is just a freak and Batman mistakenly attributes Metropolis' destruction (specifically Zod's lasers) to Superman.