The Cartoon: Come on, you know the drill: "This is 29 Acacia Road. And this is Eric, the schoolboy who leads an exciting double life. For when Eric eats a banana, an amazing transformation occurs! Eric...is...BANANAMAN, ever alert for the call to action."
Live-Action Version: Bananaman was always a bit limp in the heroism stakes, so this might work well as a kind of Kick-Ass style subversion of the traditional superhero story.
Dream Cast: Bill Hader (Bananaman), Timothy Dalton (Dr. Blight)