Pre-Flashpoint Superman calls out Marvel's Zeus, saying he'd be a coward if he used his magic. Zeus obliges, and the two fight strictly hand to hand. In fact, Zeus is so confident he'll win, that he blasts himself with all his power. Who and why?
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He can use speed, skill, and strength and durability. Mano a mano. He is allowed to fly to get into striking position but not to run away or BFR. Should the planet wind up destroyed, or he gets flung into space, he's allowed the power to survive in space.
Zeus in a godstomp. Zeus is a skyfather and even if he's below Odin there's no way he's on herald level, which is essentially what Superman is. Doesn't matter if it's strictly h2h or a contest to see who can chew gum and walk the longest. @god_spawn maybe you wanna lock this?
Zeus wins, he did not use his lightning on the Hulk, he beat him down with physical blows. Because he was teaching Hulk a lesson. This is not Zeus's full power either as he didn't really care if he killed Hulk but he was not aiming to kill him instantly either.
And we know Superman according to his fans can solo anyone and anything but get over that thought process, Zeus is just more powerful.