Since Green Lantern has taken Ryan Reynolds and there has been talk of scrapping the Deadpool movie why would they just not cast a new actor to play him? If they actually make the movie comic accurate (which would be a first) then they could do the messed up face and cast Denis Leary to play him. Who better than Denis to spout off with the great deranged/witty banter? In my opinion Denis Leary is as much Deadpool as Patrick Stewart is Prof X.
Don't be sad when something is over, be happy that it happened