It’s actually really hard to tell what games will be at next year’s Evo. There are two brand new games coming out (three if you count HD Remix), and I have no idea what games they will replace. I think it’s guarenteed TvC, SFIV, and HD Remix will be at Evo next year unless the American community absolutely hates TvC and SFIV after a few months of release.
The above games are the most likely canidates. I don’t see CvS2 coming back, nor Brawl since the community does absolutely fine without Evo and they didn’t really show up with big numbers this year (items/smash balls or not). Unless Evo is going to stick with a strict “six games only” policy, I think the above games will make it to Evo. If they are going to do only six games, I see GG, 3S, or MvC2 getting slashed off the list.