Why "ha ha oh brother" - a four/five years ago I don't think Haye would have stood a chance against the Klitschkos - now I'm not so sure - Haye is at the top of his game right now and the Klitschkos are past their prime, still good mind you, but Haye has got a great chance against either of them. I could easily see him winning.
Haye likes to counter, he has no clue how to push the pace of a fight, hence his long periods of inactivity when the other guy isn't giving him anything to counter off of. He wouldn't engage Valuev who has no power whatsoever for fear of getting caught, i don't see him doing much.
He doesn't have the durability to take the punishment that someone like Brewster did and he isn't comfortable being a swarmer so is unlikely to try to speed blitz Wlad. It just isn't his style.
He has a punchers chance against Wlad. But Wlad has a great jab that will be hard to counter off of.
Against Vitali he should just hope that he gets old overnight. Vitali throws about a thousand punches a fight and can take Haye's power. Best he could do is what he did against Valuev and just run the whole night and not engage, Vitali has slowed down in recent years and all of the injuries are catching up to him. So Haye may be able to use the speed advantage if he is really disciplined.