In fairness, Povetkin has a better chance against Haye than Wladimir. Wladimirs size, reach and jab would make Povetkins swarming aggression ineffective. But Haye doesnt use his own natural gifts consistently because hes always looking for the knockout as a result he sometimes forgets to set up his shots. He also doesnt like when he has to work round after round, preferring to set his own pace (though I dont believe he still has stamina problems - when have we seen him gas since the Thomson fight?) Povetkin, at the very least, sets a high pace even down the stretch. So he has stylistic strengths against Haye, including that his techniques not bad for a heavyweight. Alas, he lacks serious firepower so hed have to hope he could take Haye into the later rounds and tire him out. His defence is nothing to shout about, so hed probably take a fight-ending shot by the mid-rounds.
Haye vs Povetkin is a good fight but PR wise its a nightmare. What would they call it "Battle of the Ducks?"