I think (I could be wrong), but he still is the Club Owner, so whoever (if anybody) wants to take over, they will have to buy him out. They would also have to apply for a Promoters licence and, similar to when Rob took over, if they have not been a promoter before (or, indeed not currently a Promoter), they would have to have someone with Promoting experience to 'oversee' the operation.
If any of this is wrong, I am sure someone can correct me.