Rob Letterman (Goosebumps, Monsters vs. Aliens) is directing the Pokemon film from a script written by Nicole Perlman (Guardians of The Galaxy) and Alex Hirsch (Gravity Falls). Detective Pikachu will be called upon to search for the missing father of Smith's character, while Newton will portray a journalist who gives them a much needed assist.
Filming on the project is expected to start soon.
Gotta catch 'em all!
Warren Moon Accused of Sexually Assaulting, Harassing, Drugging Assistant
He is best known for his time quarterbacking the high-scoring "run-and-shoot" era of the Houston Oilers from 1984-93. Moon, 61, played in the National Football League for 17 seasons, mostly for the Houston Oilers.
It's due to begin shooting in mid-January in London. Reynolds' role is said to be motion-capture in nature. Ryan Reynolds will star as Detective Pikachu in the movie of the same name.
The new film will be based on the already-successful franchise, introduced with video games in Japan in 1996.
As the title suggests, Detective Pikachu isn't just pulling any ol' Pokemon property, which have traditionally focused on trainers who collect the cuddly, but powerful creatures called Pokemon to compete in battle tournaments.
Before he goes yellow, Reynolds will return as his foul-mouthed mercenary in next year's Deadpool 2.