Well, what I've heard is that a couple of celebrities decided to drop out (namely Jenner and Bobby) because their offers were not high enough to their liking. So how that will effect whatever the cast ends up being, we'll see.
If these rumors are true, then (I don't care about Jenner) I'm pretty disappointed in Bobby. Calling himself a superfan, hosting a competition in Season 19, only to go out like this...