Much like when his "team-up sense" started tingling, Deadpool here again refers to the sheer quantity of comic book crossovers that occur in the Marvel (and DC, for that matter) universe. Cable and Deadpool have often worked together, so Deadpool is - on one level - alluding to their frequent pair-ups. More humorously, however, he is poking fun at the fact that characters' deaths rarely prevent them from reappearing in the Marvel universe. Cable will be back, once the company decides that it needs the financial boost of another crossover.
