The British boxer suffered a brutal defeat to Daniel Dubois in their heavyweight world title fight last weekend but his promoter has proposed the idea of two clashes against the Gypsy King to finish his career.
Speaking to TNT Sports, Hearn said: "Do we wait for Tyson Fury? If Tyson Fury loses (to Usyk in December), I think AJ and Fury should have two fights and sail off into the sunset.
"If Tyson Fury wins, he defends against AJ for the unified world heavyweight championship. So we get another crack at the title there as well.
"In AJ's mind, he will want to go straight back in with Dubois. I know what he's like. But this is a very important decision and we're three days after the fact. So, give us a bit of time."
The promoter says that the decisions are extremely important for Joshua as they are likely to be the final fights of his career in the ring.
He explained: "I said to him you've got between one and three fights left.
"Then the phone went very quiet. It was the realisation that we're on the home straight. Hopefully the final chapter can be the best yet."
Hearn described how Joshua has always tried to avenge his losses during his career and will want to do the same against Dubois.
He said: "When you look back at his defeats, we've always jumped straight back in.
"When he lost to Andy Ruiz, everyone said, 'Whatever you do, don't fight Ruiz straight away. Come back, have a 10-rounder.'
"AJ went, 'Absolutely no chance – I should've beaten Ruiz, I can beat Ruiz, let me rematch him.'"
The promoter continued: "(Oleksandr) Usyk – a lot of people said we shouldn't have fought him in the first place. AJ got well beaten there.
"(I thought) I know it's a shot at the world heavyweight title again, but... no. (He thought), 'I'm rematching Usyk'. He performed much better, but didn't win.
"Now, we feel that we should be beating Daniel Dubois and we can beat Daniel Dubois. But are you ready to go straight back in with him?"