Again, Vlad Vs. Haye would have already happened if Haye had not backed out of a signed contract with Vlad, refused to provide any proof of injury as required.
I think if haye were to vacate the belt there is a chance wlad may not fight haye, he'll fight whoever picks up the belt haye vacated. With all the negotiating difficulties that scenario could well happen.
There are some people who really think the Klits are these invincle Ivan Drago warriors who everyone is scared of, and that Wlad Klitschko is the most dangerous fighter since Tyson, even though he's been destroyed 3 times by b-level fighters. Outside of boxing message boards and the hardcore fans, no-one cares about Klitschko, and no-one even cares about Heavyweight boxing any more because he's a boring fighter and a charisma free zone.