Is this contest based on the characters or the toys. If it's the characters, then yeah jedibanner might be right the SS would probably mop the floor with everyone. I think Batman and Wonder Woman might be able to beat him though. Batman is prepared for anything, and Wonder Woman can go toe to toe with Superman so there is that. Also given Robert's constraints that the games take place on Eternia, it would seem that a soceress from Eternia, Evil Lyn, would have quite an advantage.
If the contest is based on just the toys themselves, that's probably altogether a different matter.










Magneto is just there for show, Silver Surfer on hiw own could take care of the entire list of people within a day. The aspect that the SS is a weapon on his own, with all his powers an arch or a sword will be more combersome then anything else.
No contest, marvel's district 8 hands down.
DC second
Transformers 3rd.