I wouldnt mind seeing the cruisers again but I assume if Usyk wins he'll move up to heavy in search of big money fights.

I think Bantomweight is a certainty and there are some cracking fighters to go in there.

Burnett,
Tete,
Rigondeaux,
McDonnell/Inoue winner (or both if its a close fight)
Butler/Rodriguez winner
Wangek and a few other super flys