Piranha 3D actor Paul Scheer just confirmed via Twitter that his movie was banned from the con. The reasoning for this is that the clips scheduled to be shown at the panel were deemed “not family friendly” by the con.
Comic-Con has always taken pride in its family appropriate atmosphere and this horror comedy obviously didn’t fit in with their guidelines. Though many R Rated films attend the con, their clips are usually cut in a PG-13 manner which Piranha obviously had problems doing. Though the film’s absence might disappoint some, I think it’s better then forcing the film to show poor clips.