After successfully returning behind the wheel in 'Fast Five' and preparing to resurrect bad boy Riddick in an untitled 'Chronicles of Riddick' sequel (directed by David Twohy), Vin Diesel has attached himself to produce and star in an untitled action-thriller project put together by the writers of Liam Neeson's 'Unknown,' Oliver Butcher and Stephen Cornwell.

Diesel's One Race Prods. company will team with the newly formed Ink Factory to produce the project, which will be fast-tracked and jointly developed by both companies, according to Variety.

The story line is being kept a secret, but given Diesel's two-fisted talent, we're sure it's about a A) spy or ex-spy, B) assassin or hired killer, C) cop or ex-cop, D) innocent bystander involved in a 1) conspiracy, 2) failed heist, 3) government experiment gone wrong, or 4) cover-up, in which Diesel will have to i) clear his name, ii) run for his life, iii) save a loved one or iv) kill a lot of bad guys. Just put together any combination (or all) to fill in the blanks.