I would love to see a collection of their older games from the NES/SNES era on a disc. Unfortunately, a lot of those games were licensed properties from Disney, Marvel, etc. Inevitably, there will be some kind of hold up legalities because an X-Men game mentioned Mr. Fantastic in it or some other nonsensical bullshit. And any collection Capcom may consider doing, they will half-ass it like they did with the new Megaman collection by not including all of the games.
How cool would it be to buy a Street Fighter Anthology that truly includes all of the Street Fighter games proper? Street Fighter, Street Fighter II, Street Fighter III, Street Fighter IV (in their most recent/complete incarnations), all of the Alpha titles and all of the EX titles. A true representation of the series from beginning until now (SFV notwithstanding), in a nice box set with commemorative book ala the Wii version of Super Mario All Stars. I couldn't throw my money at Capcom fast enough.