who has Haye beaten? Monte Barrett? the corpse of John Ruiz? old man Valuev? how would beating a guy who's best win is shot Valuev, benefit your resume in any significant way? Vitali isn't KO'ing Haye, and neither is Haye going to win, it will be another festival is avoiding fighting and pot-shots, just like Vitali-Johnson, at the end Haye will put his hands up in victory, only to lose a 0-12 decision
surely you would only move up if you beat someone of note? Haye was a good cw, but not a good hw. unless you are ranking vitali as a cw (which you aren't) i cant see why beating an above average hw would move him up any rankings
While it would be one of is best wins and add to his resume in reality it would not do enough to bump him up the ATG rankings. Haye's legacy at heavyweight is practically non existent he was simply another short term title holder in an era dominated by a better champion. Vitali beating Haye would be similar to Lewis beating former title holders like Botha or Tucker, decent wins but hardly significant in terms of ATG ranking.
Haye is not an outstanding scalp really. Thin resume and doesn't even hold a belt right. Good contender but not more.
Stays where he is. It would probably be his best win, but Haye has not done enough for defeating him to matter that much.