Great, first Darth Vader and Yoda in Soul Caliber 4, now the Justice League in Mortal Kombat 8. All that's left now is for James T Kirk and Jean-Luc Picard to be playable in Street Fighter 4.
Of course on the issue of Marvel vs Capcom, yeah it's doubtful it'll ever happen, but what Capcom should do is take the engine to make another VS series. My personal dream would be to see a Nintendo vs Capcom. I mean, after the success of Smash Bros, you'd think Capcom would be on board for such a game since it's bound to be very popular. Since the Smash Bros series has made movesets for a lot of Nintendo characters, it's also makes Capcom's job much easier since they have something to work with right away.
Yeah, this is even less likely to happen then Marvel vs Capcom 3, but that wont stop me from still hoping.