While the majority of The Suicide Squad‘s cast is a mystery, we do know a few characters who will pop up in the upcoming DC blockbuster. Returning from Suicide Squad are Margot Robbie’s Harley Quinn, Viola Davis’ Amanda Waller, Jai Courtney’s Captain Boomerang, and Joel Kinnaman’s Rick Flag. The few new characters that have been announced are unexpected, likely teasing the obscure choices that James Gunn will bring to theaters. David Dastmalchian will play Polka-Dot Man, while Daniela Melchior will be Ratatcher. Plus, King Shark will have a role.