Anthony Joshua is just two fights and two belts away from becoming the first undisputed heavyweight champion since Lennox Lewis.

The 2012 Olympic gold medalist already has the WBA (Super), IBF and IBO belts around his waist and will slog it out with Joseph Parker for the WBO strap on March 31. It promises to be an incredible night in front of 80,000 fight fans at the Principality Stadium.

It certainly won't be an easy bout for Joshua, though, who will be facing the best version we've seen from Parker and a fighter with impressive speed and a solid chin.

That being, many are already turning their heads to the prospect of a unification match with Deontay Wilder in the summer with Eddie Hearn already in primary talks with Al Haymon.

That's not complacency, that's his job but there's still reason to suggest people are getting a little ahead of themselves with Joshua still to overcome Parker.

Worries over a potential Deontay Wilder-Anthony Joshua bout

And even then, there's fears that negotiations with Wilder's team could fall through just like they did over the winter with disputes over the role of Dillian Whyte, the split and the location.

It's despite the fact, the more times goes on, the risks to the fight are greater. There's a chance one fighter could lose their belt and unbeaten record, Wilder could lose his edge as his ages and finding a gap between mandatories may be impossible.

One man who fears for the fight is David Haye who painted a worrying theory for fight fans during an interview with iFL TV.

David Haye thinks fight fans will have to wait until 2019

He seems utterly convinced that Wilder-Joshua won't take place in 2018 and even suggested Parker could ruin the party.

When asked whether he thought Wilder-Joshua will happen this year, he said: “I don’t see it. My gut instinct says no. Maybe next year.

“If Parker beats Joshua, then there’s a rematch. So Joshua vs. Wilder won’t happen this year.

“There are bigger fights, more financially lucrative fights out there for Joshua that he might feel are easier.”

Haye seems convinced that the bout won't go ahead and after the Parker fight, perhaps he sees the likes of Alexander Povetkin and Jarrell Miller next in line for Joshua

That being said, it's hard to see them becoming 'more financially lucrative' than the chance to go undisputed against Wilder. The idea of Joshua taking easier fighters like Haye alludes to, though, wouldn't be anything new in elite boxing.

Fight fans will simply have to hope that the fight comes sooner rather than later and we don't have a Floyd Mayweather vs Manny Pacquiao situation on our hands.

If Wilder and Joshua get it on this summer, it will be an absolute slugfest.

Who do you think would win the mega-fight - Wilder or Joshua? Have your say in the comments section below.