No, the winner of this fight will still be A HW champion, not THE HW champion. This isn't p4p....until one of these guys beats Wladamir Klitscho, he is the #1 HW in the world.
Unification would involve Klitschko BF, Chagaev BA, and Maskaev BA. It should involve the BO Inragimov as well, IMO. Dont worry, they'll be another mis-mandatory like the Byrd vs Brock winner or some other to **** THINGS UP AS ALWAYS. Chagaev vs Ibragimov is a step in the right direction BUT IS NOT UNIFICATION:good