Iron Man star Robert Downey Jr. is staying with the superhero genre that's given him his big comeback with potential upcoming project Master Mind. It's a new animated movie being produced by his Tropic Thunder co-star (and scriptwriter, and director) Ben Stiller. But this time, he may be playing the part of the bad guy . . . or, at least, suicidally-repentant former bad guy.The future Dreamworks movie, written by first-time screenwriters Alan Schoolcraft and Brent Simons, centers on a supervillain who decides that life has lost its meaning after he accidentally kills his nemesis in the middle of an epic clash. The somewhat-Venture Bros-esque concept will be directed by First Flight directors (and Shark Tale survivors) Cameron Hood and Kyle Jefferson, and may also star 30 Rock's Tina Fey. Weighing up the potential voice talent and subject matter against the prospect of Dreamworks Animation's track record, it's safe to say that, as long as the result is more Kung Fu Panda and less Over The Hedge, we're cautiously looking forward to the finished movie. Robert Downey Jr. in talks for DreamWorks Animation project [Entertainment Weekly]