Reports say that Marvin Gaye's son is against the upcoming biopic and doesn't want Lenny Kravitzto be a part of the film.The producers and directors of this film are very wrong and shameful ," Marvin Gaye III tells TMZ. "[They're] trying to do a film about a low period in his life. They don't even know the whole story."To top it off, the younger Gaye's childhood friend and classmate, Kravitz, has been cast in the lead role.