Spoilers present, I'm sorry!
I was along for the ride until Russell Crow's character was revealed. That part was really unoriginal.
When he revealed who his character was my girlfriend and I both burst out laughing, but given the tongue-in-check nature of the film and Crowe's over-the-top performance we both came away with the impression that was the intended reaction.
In these days of sequels/prequels/remakes and comic book/computer game/theme park ride adaptations, 'unoriginal' has become a simple statement of fact rather than a valid criticism for 95% of movies released now.
I'm glad you guys had a laugh! I groaned. lol.
Man that's a sad statement of fact! But you're right.