I quite like Steve Carrell, but for this particular role Helms feels like a better choice (still I anot sure he's the best choice). The thing about Drebin is you have to believe he can shoot an innocent person because he sincrely believes its the right the thing to do at the time, but still find him likeable. Something about Steve Carrell, he's almost too nice for that sort of role. Still Helms can definitely come off as not likeable, so who knows. Maybe they'll go in another direction though. Actually, Charlie Sheen might have beea bette choice. I know he hasnt leas a film in a while but he has been in plenty of these sorts of movies and can be a confident jerk but likeable.
Then again, Sheen had the Hot Shots movies...