"Gladiator" scribe David Franzoni has come aboard to adapt Revolution Studios' "Hannibal, " reports The Hollywood Reporter . Based on Ross Leckie's novel that Vin Diesel is attached to star in and produce through his One Race Prods. The project will see Diesel portray the third century B.C. Carthaginian general who rode across the Alps on an elephant to attack Rome. Revolution optioned the book earlier this month with Diesel attached to star.