definitely doomsday!
if he can beat superman, he can beat Solomon grundy!
Because not enough people voted for her.
dooku would probualy win
Darth Vader would win. He can use the force.
King Kong would win.
Jason would win, Chucky's a doll he has no chance against Jason.
hulk
Doomsday he can't die
Luffy would win, but it would be hard.
Hulk and Superman. Superman would have The Hulk with him. Superman can't beat those two. Hulk can. Hulk would rip Grundy's heart out and Thor would be beaten by Superman. Only one of the two. Superman would fly Hulk with him and celebrate.
Tie
goku
Doomsday would destroy Jason so easily and it doesn't matter if Jason can't die because he can't win in a fight against Doomsday.
doomsday after a long fight he will adapt to thors attacks.
Super Man
Iron man would win hands down!
Depends on who adapts first. If Doomsday evolves telepathy he could win. If Juggernaut calls upon enough magic from Cyttorak (which is highly unlikely) he could destroy Doomsday with a single punch. Otherwise, it's forever a stalemate, with Doomsday using Juggernaut as an indestructible punching bag.
Doomsday the cloverfield guy is big but superman has taken down bigger dudes with actual powers and doomsday killed superman. Though he died in the fight as well.