It will most likely be Mously

Then the winner of the Cotto-Judah-Margo-Williams mini Turnament. If they actually go all the way through with it.

Then Hatton, if he beats Castillo.

To be honest, I am not that interested in him fighting Hatton. He looked terrible against Collazo IMO and I think PBF would dominate easilly. I am not a big fan of naming other fights as evidence but in this case Collazo is a slick quick boxer like PBF.