After credit ending of X-Men Origins: Wolverine showing that Deadpool is alive and his mouth is not sewed shut... I love Deadpool and they better make a movie for just him but they better not ruin his origins like they did for Wolverine. Loved the movie but they didn't do the best job with Deadpool's backstory in my opinion.
Deadpool - Marvel Comics - Merc with a mouth. This is why Wade has a full body costume and never takes it off. It's all part of his backstory. His real one. Cancer, scientific research, gone wrong, thrown out to die, was labeled a Deadpool, and he escaped and became the merc with the mouth.