doomsday wins after a long fight, hulk may be the strongest but doomsday cannot be killed and if he is he comes back stonger and can't be killed the same way again, doomsy has no vital organs and only lives to kill and destroy.
hulk would try to put him down in a good ol' streetfight however superman did that before and he only evolved stronger. plus doomsday is immortal can u really say that about the hulkster?
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Did the original post say Doomsday can't be killed? Then say he can't be killed the same way twice? So he can be killed, making the first point moot, really.