Well if it's a 2-3 character split for TvC I'd want any of these characers:

Capcom:
- Dante (DMC)
- a Power Stone character
- Amaterasu (Okami)
- Leon, Chris or Wesker (Resident Evil)
- C.Viper or El Fuerte (SF4)

Tatsunoko:
- Speed Racer
- a Samurai Pizza Cat
- a Tekkaman character