Robert Downey Jr and Ben Stiller join “Master Mind”. Robert Downey Jr and Ben Stiller have signed up for new DreamWorks animation Master Mind. The Tropic Thunder stars will be joined by 30 Rock’s Tina Fey in a story of a supervillian who finds himself without a purpose after he kills off his heroic nemesis. Fey, Stiller and Downey Jr’s roles have not been confirmed. Scripted by Alan J. Schoolcraft and Brent Simons, it is scheduled for release in November 2010.