If Usyk becomes long-term champ (which he deserves) isn't it likely the belts will slowly split apart?? More than likely in my view. (Big congrats to Usyk for a great fight today).
Seems like Usyk is a guy that likes to keep the belts together, and even become undisputed if possible. And has his main promoting company K2 has already proven to be willing and capable of doing thaat as long as possible. If the belts would return in Fury's hands, or in one of PBC's HW's, I expect they'd be shattered within a year though.
Them belts are like the three rings from Lord of the rings. They will eventually find their way back to the source - Tyson Fury.