Klitschko ruled the heavyweight division until he faced Fury, who boxed his head off on that famous night in Dusseldorf, Germany, to become WBA (super), IBF, WBO, IBO, The Ring, and lineal heavyweight champion of the world.
'He [Joshua] just came out and told the truth: I want Deontay Wilder on April 13 - that's my fight date at Wembley, ' Hearn told Sky Sports.
Joshua needs to stop with the demands, and be fair, if you really want this fight and care about boxing and your legacy be open to negotiations with Deontay Wilder give realistic options not my way or the highway offers.
But Joshua said he would much rather fight Wilder than compatriot Fury in order to unify the division by claiming the American's WBC belt.
"It might be Tyson Fury, it might be the victor of Whyte vs Chisora, it might be Oleksandr Usyk, it might be Jarrell Miller". "I don't know what else I have to do to get that message across".
With Wilder, Fury and Joshua all jockeying for position and the potential return of Klitschko looming on the radar, the world heavyweight championship picture looks set for an exciting journey in 2019.
Joshua is booked in for an April 13 fight in London and took to ESPN on Thursday to make his case for the money-spinning bout to happen on that date, adding that his preference is to face Wilder, not Fury, as he aims to collect the final strap. I always say I'm the best. So I don't know where this lineal [championship] just popped out of the woodwork from.
Joshua, 29, and Deontey Wilder have found it hard to agree for a unification bout and the two unbeaten champions have trade words while accusing each other of not wanting the fight to happen. I'm the one leading the pack, I've been doing that since I made my debut.
If he did return, Klitschko may well believe he has unfinished business with both Joshua and Fury, with both British heavyweights defeating the Ukrainian former world champion in title fights prior to his retirement.
"I think he text (ed) AJ and said: "I want to come back". Five years in, several title defences and I'm running the game.