Eddie Hearn, who works with Oleksandr Usyk, expects the heavyweight clash with Joe Joyce to head to a purse bid.
The World Boxing Organization has sanctioned Usyk-Joyce for their interim-title.
Anthony Joshua is the WBO's full champion - and also holds the WBA, IBF, IBO titles.
Joshua is heading to a full division unification with WBC world champion Tyson Fury.
The Fury-Joshua winner would have to make a mandatory defense against either Usyk or Joyce.
Usyk and Joyce had collided in the amateur ranks - with the Ukrainian boxer walking away with a decision win.
Joyce secured the number two ranking under the WBO, when he knocked out highly ranked Daniel Dubois in 2020.
Usyk was the undisputed champion at cruiserweight, after unifying the WBO, WBA, WBC, IBF titles in 2018. He officially made a move to the heavyweight division the following year.
Pursuant to the WBO's rules, when a world champion moves up in weight - they automatically become the mandatory challenger in their new division.
The two sides have been negotiating for the last few weeks. No agreement has been reached at the moment.
"The WBO have ruled [Usyk vs Joyce] for the interim title with a view to the winner fighting the winner of AJ-Fury," Hearn told Sky Sports.
"I believe that fight will go to purse bids in a couple of weeks. Certainly we will be bidding for that fight. It is a good fight. There is history between the two of them from the amateur game. It is a fight that we would be interested in putting together."
Joyce's manager, Sam Jones, indicates that both sides are still engaged in active negotiations to finalize a deal.