Those two Marvel guys you like with the guns are in one book together this spring.
Deadpool Versus The Punisher is a five-issue miniseries written by Fred Van Lente with art by Pere Perez. It seems like this is something that should have already happened by now, but I'm sure there's an appetite for it either way. The guy with all the weapons and the sense of humor who can't be killed, versus the guy with even more weapons and no sense of humor, who can be killed but somehow never dies. It's a match made in gun-based-crossover heaven.