I don't think that rumoured-to-be-cancelled Nicktoons crossover movie would've worked - but a crossover of the superhero parody mascots from within Nick's shows (Mermaid Man & Barnacle Boy, Powdered Toast Man, Ultra Lord, Manarctica, Crimson Chin, Really Really Big Man, maybe even Reptar) would be some great campy fun. The rare sort of cartoon adaptation I think would be better in live action too.