James Gunn’s The Suicide Squad is shaping up to be a very different beast than its predecessor. The upcoming sequel/reboot will bring back Harley Quinn (Margot Robbie), Captain Boomerang (Jai Courtney), and Amanda Walker (Viola Davis) along with adding new faces Idris Elba and John Cena for unspecified roles. But now it looks like in addition to the old gallery of villains, Gunn is really going all in with some loony picks for the cast. [caption id="attachment_480223" align="alignright" width="350"] Image via Facebook[/caption] According to THR, Gunn has cast Ant-Man actor David Dastmalchian to …