There are a host of heavyweight hopefuls swarming around the champions - here's Jamie Moore to sort the men from the boys.
Entries such as Tyson Fury and Deontay Wilder are fairly unavoidable - but where will they feature? And will British stars David Haye and Anthony Joshua make the list?
Let's see what the boxing pride of Salford had to say about the pecking order of a division ready to catch fire...
10. Anthony Joshua - 15-0-KO15
Some people will say he should be higher than this already and potentially I believe he'll be a world champion, but I don't think he should be rushed. The Dillian Whyte fight showed that he needs those tests to make him a better fighter. He'll learn from it but he's a way off the top right now.
9. David Haye - 27-2-KO25
He wasn't up against much the other night but looked back to his explosive best. We won't know what he's got left until the sterner tests arrive but he looks as athletic as ever and will always have the punch. The speed and timing - especially the right over the top - were massively impressive after that long out of the ring.
8. Charles Martin - 23-0-1-KO21
I don't think he'll hang on to the belt for long. I've got to be honest and say I don't rate him very highly - I think his success is down to the fact he's a southpaw, and that people struggle against that. There aren't that many heavyweight southpaws around to provide sparring.
7. Vyacheslav Glazkov - 21-1-1-KO13
Controversial, I know, but I think he was very unfortunate the other night with that knee injury. I've experienced it myself. I know he lost technically but I believe he's a better fighter than Martin and in time he'll prove that. I'm going to edge him just in front of Martin.
6. Kubrat Pulev - 22-1-KO12
Pulev is a solid fighter. He lost against Klitschko but those with the stature of Pulev are always going to struggle with someone like Klitschko, who's cagey and rangy. Pulev doesn't have much dynamic speed but he's a good plodder - Klitschko just managed to keep him at long range.
5. Luis Ortiz - 24-0-KO21
This guy is a good fighter and very, very dangerous. I wouldn't be surprised if the big boys avoid Ortiz for the foreseeable future. He's going to be a handful for anybody in the next couple of years and promoters should think twice because potentially he could be a danger man in this division.
4. Deontay Wilder - 36-0-KO35
I still see Wilder as a challenger coming up. I don't really see him as a champion because in the eyes of everyone, there should be one true champion and that's Tyson Fury at the moment. He's talented and improving but he hasn't looked as explosive since he stepped up to top level.
3. Alexander Povetkin - 30-1-KO22
It's starting to get tricky but I'd have to put Povetkin above Wilder. The Russian has proven himself as worthy of mixing with the elite on several occasions. He should be getting his shot at Wilder soon so we will find out more when the pair meet.
2. Wladimir Klitschko - 64-4-KO53
He's getting to the stage where he might be on the decline but against any of the others, you'd still have to make him a favourite. I think Wladimir's a clear second best and there's no substitute for the experience he's got at the top level.
1. Tyson Fury - 25-0-KO18
Fury beat the man who was top of the pile for over a decade, so you can't deny that he's No 1. I believe he'll be better in the rematch and also, it'll be too soon after the first fight for Klitschko to recover mentally. I think the result will be pretty much the same.