Just starting a list of figures that are fun to use in a multi-player environment. I'm not talking about uber-powerful "take all comers" characters, but rather figures that add a little bit of "extra" fun, or element to the game.

For instance:

Scorpio from Captain America might be fun to field with his special object on the board as "bait" for other teams.

Laufey - gives everyone on the map an action token when KO'd.
Anarky - removes tokens from opponents when he uses PC.
Black Cat - uses PC on every opponents turn!
Flashpoint Aquaman - floods the map in revenge!

There's also the silver bullets:

Kid Zoom, Leech, Harry Leland, etc,

So, list some suggestions and I'll add them to this list and rep you if they're worthy. Otherwise, we'll heckle you for saying "Batman, cuz he pwns!"

How about GGFF Beta Ray Bill.

Kind of nifty when its all flyers losing 1 to their speed and attack.

Bag-man is always fun in a battle royal, no one wants to hit you, and you can run around hitting them. Quite anoying to the other players, and fun for you!

I like Extant from B&B if you can get him on his damage power -

MULTI-DIMENSIONAL ATTACK : When a character takes damage from Extant's attack, all other characters on the map with the exact same name take an equal amount of damage.

Good for all those pesky A.I.M. agents!