Of course Vegeta!
Vegeta's just an enhanced version of Superman. He can do everything that Superman can and more. VEGETA WINS! Plus Vegeta's Jimmy Neutron hair is bad.
No, no. Superman is INVINCIBLE. Vegeta isn't.
Doomsday he can't die
Luffy would win, but it would be hard.
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.
Iron man would win hands down!
Super Man
definitely doomsday! if he can beat superman, he can beat Solomon grundy!
The Flash would win because spiderman would make a big enough web that flash would eventually get stuck.
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.
flash