No I think Capcom will think it is more valuable to have as much casual appeal as possible for the initial release. This is why I expect the rest of the green section is SF2 characters.
You have the casual appeal by already having some of the SF2 characters in the roster, which they've done already by giving us Chun, Bison and Cammy. You don't need 80% of the SF2 roster in the vanilla version to appeal to casuals. MKX, for example, only needs Scorpion and Sub-Zero and at least two of the other ninjas and they've pleased the casual audience. They then please the causal audience even more by having other ninja and trilogy characters as DLC. That's how SFV should do it; Give us some SF2 characters then give us a few more with DLC. You please the casuals at launch and you please the casuals at DLC.
I feel like this fanbase relies on the SF2 characters far, far too much.