Haye suffered a “freak” biceps injury just weeks before the scheduled December 17 clash which would have seen the two rivals back in the ring together after their epic battle on March 4.
On that first meeting, Haye also picked up an injury, rupturing his Achilles tendon during the fight before his corner threw the towel in during the 11th round.
Tickets for the highly anticipated rematch, back at the O2 Arena, sold out in minutes last month but around 900 are understood to have been returned due to the change of date.
Those who missed out on tickets the first time around will have a second chance when the remainder go on sale at midday today through AXS and boxing fans can join a waiting room here.
Bellew is once again the underdog for the clash but appears confident of wiping out Haye, which he plans to follow with a fight against Tyson Fury.
“I now have a very clear plan for 2018 and that is to knock out David Haye and then knock out Tyson ‘Stavros Flatley’ Fury and end both their careers but first things first I need to rid the sport of David Haye on May 5 and I look forward to doing this in what I believe will be an explosive fight,” Bellew said.
He added: “Make no mistake this is a dangerous fight.
“This could be my last fight if it goes wrong.
“David is a dangerous, dangerous fighter. He’s going to want to prove everyone wrong.
“He didn’t say much in the build-up to the last one.
“I’m sure once we start getting closer he’ll have something say.
“All I want is him be ready, be fit, be well and then get in the ring and get punched all over the place off me once again because that’s what’s going to happen.
“David Haye is going to lose to me and “The Fat Boy” is going to end David Haye’s career.”