Seems unlikely for Marvel Studios to have a 3 hours panel, He's probably assuming panels for amazing Spider-Man 2, X-Men: Days of Future past and Marvel Studios to run consecutively. If that's the case I think I'll have to camp out to get a seat.
I'll say this:
1) Marvel has never had a three hour panel. Not last year when they did their 'AVENGERS' victory lap + announced ALL of Marvel's Phase 2 movies AND did the full nine-yards for IRON MAN 3. Not in 2010 when they did the combined panels for THOR & CAP. AND intro'ed THE AVENGERS. This is definitely new territory for Marvel films.
2) I can't imagine Latino Review or elmayimbe lumping Fox films with marvel films. Latino Review is the absolute BOMB when it comes to breaking Marvel exclusives, and there is zero chance that either Fox or Marvel would let the other (rival) studio hog their glory.
3) by July, THOR 2 will be done filming I think, CAP 2 might be close to finishing, and GUARDIANS will have MAYBE just started. In 2010 when Marvel had THOR & CAP in the pipe, they should quite a bit of stuff for THOR w/most of the cast, then ushered them offstage and brought out the CAP cast to show a fully edited scene after five days filming. I just throw this out for reference
4) WORLD'S END is being released August 2013. This is a sci-fi/comedy for Comic-Con hero Edgar Wright, and it would not surprise me to see him have a panel (he did panels for SHAUN OF THE DEAD, HOT FUZZ, and of course SCOTT PILGRIM). Perhaps he might pop in to the Marvel panel, as ANT MAN would likely be in pre-production by July.
5) I've seen every Marvel SD Comic-Con panel, and without a doubt I can tell you that they really know how to do Comic-Con. If you've never had the pleasure of attending, you're in for an entertaining treat.