Non-playable Villains

Skorche

With the return of enemy of the state we got to face Gorgon who isn't a playable villain. (which is a good thing) I would like to see more non-playable villains. Going up against Gorgon is much more entertaining to me then facing yet another Ares, or Juggernaut. I often forget how nasty he can be because I don't have access to him 24 hours and don't have ways to see how his moves work with other members of my roster.

Ones that come to mind:
M.O.D.O.K
Viper
Sentinels
Thanos
Kang
Enchantress/executioner

If they're not playable it also has the added bonus of not locking out our roster when we fight them.