I don't think it would particularly work in this case, if you based teams on theme, a'la KOF, you'd have teams like Ryu-Ken-Makoto(or Sean, or Dan, or make them the Shoto-Posers team), Akuma-Evil Ryu(The two of them would be enough for a team), Guile-Charlie-Cammy, Cody-Guy-Rolento, Zangeif-Alex-R.Mika etc. Not exactly the most balanced teams in the world. Still an interesting thought though.