I think Deadpool has great potential, but having Zach Morris-Saved By The Bell-moments would ruin it. Perhaps he can be omnipotent and know what is going on with all the X-Men (and even the world that was changed by Wolverine going back), but if he said stuff like "Hey, I know this is a movie, watch me kill this guy," then it would ruin the experience of actually watching the movie, and it would ruin any other movies that he would be in.