The Caped Crusader
The problem isn't that The Caped Crusader would make people think of Adam West -- the problem is that it wouldn't make people think of Christian Bale. Remember, films have to be targeted at a mass audience, not just the people who are already familiar with the concept. The Dark Knight was one of the most successful superhero movies ever made -- of course they're going to include The Dark Knight in the title to its sequel.
makes me think Batman...period.