The large fat biker in Deadpool sometimes referred to as Buck and other times as "Fat Gandalf" is most likely a stealth cameo from a minor assassin character from Marvel comics history by the name of Bullet. Good for one or two humorous scenes in Deadpool, the actor who plays Buck (you may remember him as the guy who played C*ck-Sandwich Big Bob in Harold & Kumar Escape From Guantanamo Bay) could easily make a bigger return in the sequel. If only as cannon fodder for Wade or some other bad guy, of course.