Give Wonder Man Mjlonir and a computer brain that could compete with the motherbox, then he wins. She has that Mega Rod and the Mother Box, of course Wonder Man will lose. Strength wise, hmmm she's supposedly the second strongest women next to Wonder Woman, but lifting weights of 50 tons? Wonder Man is stronger than that. He's also quite durable as well. Survived the Nega Bomb, withstood a blow from the Mjlonir where he was KO'd, but not killed. Whooped Thor's a$$ once. Yes even if Thor was caught off guard, that's still a win. Krona caught Big G off guard, and killed him, and people count that as a win. Big Barda takes it, if she has her toys. It would be certainly more difficult for her to win without it, but it's not impossible. Could go either way hand to hand combat.