Supercon

Supercon is a movie starring Clancy Brown, Maggie Grace, and John Malkovich. A rag-tag group of former TV stars and comic book artists, who make their living working at conventions, decide to steal the loot from a crooked promoter...
A ragtag group of former TV stars and comic book artists who make their living working at conventions decide to steal the loot from a crooked promoter and an overbearing former TV icon.