I'd say Star Trek is generally seen as higher brow and more intelligent than Batman.
Maybe by its fans.
The current brand of Batman is far better done and put together than any Star Trek movie out there. It's far more appealing to the general public than Star Trek. It also elevated Nolan to such heights that him coming to helm the 3rd Star Trek movie would be regarded as a huge step backwards for him.
At the end of the day it's ludicrous to think Nolan would come within 100 feet of anything to do with Star Trek.