After his victory, Bellew called out Andre Ward. And he claims he knows he can beat him. Ward may be retired, but after KOing Kovalev was talking about wanting to move up to HW. Which was interesting because Bellew showed no desire to fight AJ (because they are friends) or really any of the HWs due to the size difference. (at one point he fancied a fight with Wilder then decided Wilder was too big) If Ward ever does return, Bellew may actually be a good test for Ward at a higher weight. Personally I think this would be an interesting fight. Injury or not, the ease at which Bellew dispatched of Haye was impressive. And though I'd expect most to favor Ward I think given the size advantage he'd have on Ward, Bellew could give Ward a very tough fight at Cruiserweight or Heavyweight.
I reckon Bellew to be honest, 175 versions, it's not a competitive fight but at HW, at least Bellew is somewhat proven.