Adam at 2010-01-30 22:41:36:
Not really a legal point, but I'd personally steer clear of a generic title like "Hero".
Not just because it's been used before (although that's a very good reason to move past it), but also because it doesn't really sizzle.
Imagine a development executive pouring over a mound of spec scripts, skimming only to the titles. "Hero" is incredibly vanilla and really doesn't pop off the page, no matter what the subject matter may be.