The twist is that Wolverine(adamantium) becomes just as fast as Superman, gets Savage Hulk level strenght, and also gets the ability to fly and breath in space/under water.
While the upgrades stipulated make Logan a threat, they in no way make for any guarantee of majority victory against the likes of Supes. They *do*, however, open the window of possibility. Supes still dominates, but will have wounds to show for it, in a conventional battle -- 8/10 Supes, with a higher scoring if he goes buck-wild on Wolvie. (Note, however, that the enchancements do allow for Logan to get a victory here and there, so it isn't a total stomp). Now, if you added, say, Colossus (or similar) durability, with Wonder Woman's fighting skills/finesse... then he gets an extra win or two, taking the level down to 6/10 for Supes, meaning Supes has a real possibility of things not going his way, though Clark still trumps in versatility.
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With superman's speed and reflexes and Hulk's strength Wolverine is gonna cut Superman's head off. Superman's only option is HV, if he tries to go h2h he dies FAST.
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Azula: My mommy didn't love me so I'm going to burn down your village.