This movie will be based on the books 

The villain of the movie is Evil George, Evil Harold, Captain Blunderpants and their Utopiqua Kids sidekicks (Greego, Dohlar and Captain Pandernuts)

The voice actors for a movie

Movie George Beard- Kevin Hart

Movie Harold Hutchins- Brian Hull

Movie Captain Underpants- Ed Helms

Show George Beard- (Movie George Beard’s counterpart) - Ramone Hamilton

Show Harold’s Hutchins (Movie Harold Hutchins’s counterpart) -Kelly Stables

Show Captain Underpants - (Movie Captain Underpants’s counterpart) - Nat Faxon

And more characters 

(Note: for animators and sound effect, please add Movie-Show George or Harold’s stomach growl part and one of the character’s tummy is vibrating too)