Seth Rogen and James McAvoy (yeah that guy with those blue eyes)? are? slated to be in I’m With Cancer, a film based on? Will Reiser’s (a producer for some HBO and Vh1) experiences with young adult cancer.? ? According to an article in First Showing, “The script is about Reiser’s struggle to beat cancer, with a story centering on a 25-year-old who finds out he has the disease.”