I fail to see how what Haye has and hasn't done in his career has any relevance to Fury's chances against Wlad. Haye was an easy fight for Klitschko, so none of it has any bearing.
We can talk forever about who would've won between Haye and Fury , but it means fuck all. What matters is Fury v Wlad, and looking at the facts and recent history, that has to make Fury a complete underdog.
however, that doesn't mean he goes in there without a chance, albeit a small one.