Deadpool agrees to help Tony Stark with an experiment, but once he's in will he want back out?
Crossover - Batman & Deadpool - Rated: M - English - Adventure/Humor - Chapters: 1 - Words: 1,220 - Reviews: 7 - Favs: 17 - Follows: 24 - Published: 11/12/2015 - Deadpool/Wade W.