Sending up a rival via the medium? It's been done before. In Marvel's shoes, I'd have aimed for the directors, producers or head of Fox, rather than the actors, though the latter are probably more recognizable. Other comics have shown caricatures of politicians or people the authors don't like in various ridiculous positions, and you know what, it's a bit petty but hey, fair enough, and sometimes it can be quite funny. However, poking fun at Fox's FF is one thing; showing the avatars of real people getting wiped out (presumably, though the panels displayed don't show it) is quite another and passes that line of humor by a mile. The joke, if that's what it was, fell really, really flat, Marvel.