Kiwi Joseph Parker may be promoted to the headline act, when he returns to the boxing ring in April.
Parker's camp has been in talks with Dereck 'Del Boy' Chisora for a fight on April 21 (NZ time), on the undercard of Dillian Whyte's next outing at London's 02 Arena.
But Whyte has been ordered to fight American Dominic Breazeale for the WBC's interim title and promoter Eddie Hearn doesn't think a deal will be struck in time.
Now he's looking at alternatives to headline the card and Parker vs Chisora might be the best option.
Even though Hearn wanted the card to be a "heavyweight extravaganza", he may have to add welterweight sensation Terrence Crawford, who's due to face Amir Khan in New York that same night.
"The April 20 show in London is definitely happening, but I doubt it will be Dillian Whyte on that card," Hearn told IFL TV.
"[Parker vs Chisora] is in play, very much in play. It could headline the O2, it could still be a monster card, but it's not big enough, as its own event to be a pay-per-view.
"So do you add Khan on to that? Do we marry up the two and do a big show through the night, or do you add a bigger fight on the card?
"There are a lot of things that are in conversation."
Three of Parker's last four fights have taken place in the UK, where he beat Hughie Fury, but lost to Anthony Joshua and Whyte last year.
Parker last fought in December, when he knocked out American Alexander Flores in the third round in Christchurch.
Chisora has had 38 career fights, winning 29 and losing nine, including twice each against Whyte and Tyson Fury.
"I think, at the moment, my team is focussing on Chisora," Parker told talkSPORT.
"I think that throws me straight into the mix again. Chisora's a guy who's been around for a long time, got a lot of experience.
"As long as it makes sense for both teams, I'm happy to go ahead. I'm ready for war, I know he likes to go to war."