Yeeeeessssss. I'll take Simon, Trevor, Richter, Christopher, and Leon pleez. Reinhardt too, though doesn't have the Belmont name. Throw in Sonia if Konami isn't hellbent on her not being part of the timeline (if that matters for this game).
I think by default Simon deserves it. Not only was he the first(game-wise), he probably has the most appearances on Nintendo consoles. More deserving than Trevor, Richter and Christopher, and Leon, well, he was never on a Nintendo console at all. At the least, Solid Snake(even though I still think CV's more deserving a game to be featured than Metal Gear) at least has roots in the NES and Twin Snakes WAS released on Gamecube.
Do we know if Yamane's role has anything to do with CV specifically, or is it the usual, "hire a mess load of awesome Japanese composers", which Smash Bros been known for doing? I know Uematsu composed for Smash Bros before, and that didn't mean they included a Final Fantasy character(though if they did, in the future, like include classic FF Fighter, Onion Knight or Mog, that would SOOOO fuckin ROCK... just no Cloud... FFVII has yet to appear on a Nintendo console).