Let's focus on Usyk. Tyson Fury wants Usyk - but on purse split terms that favor him and not Usyk. A fight with Chisora 100% makes sense towards that end because Chisora v. Usyk was - against the expectations of most of us - a close and competitive fight. If Fury manages to stop Chisora (and remember that's a feat that Fury has already accomplished) - he's going to be strengthening his negotiating position at the expense of Usyk because Usyk did not stop Chisora. If AJ beats Usyk, then Fury will got back into "boxing hibernation" (he'll probably do some wrestling-related or MMA-related nonsense) because there will, of course, be a third AJ v. Usyk fight.