Duco Events, who promote Joseph Parker are hoping the New Zealander defends his WBO title successfully so he can face Anthony Joshua.
Hughie Fury is the Brit Parker is defending his title against and his promoters are hoping to set up fights against Haye, Joshua and Tyson Fury.
Joshua will face Klitschko in front of 90, 000 fans at Wembley, putting him in Duco Events sights.
David Higgins, a director at Duco Events, told Sky Sports: “Joe’s stock – assuming he wins – will go through the roof in England, therefore it would make sense for Joe to probably target English opportunities next after Fury.
“For example, if Joshua won, that would be a better unification because Joe’s stocks are high. It looks like we are heading down the UK route at the moment and then once you conquer that, the United States is the next logical step.”
Higgins said: “I think Wilder will happen, but my gut feeling is it’s probably a bit further down the track, but not too far away.
“I think the belts will unify. I wouldn’t be surprised if within two years’ time there is an undisputed heavyweight champion among the crop we are talking about. One will rise to the top.”