Just speculating here…
* MGM will continue to offer resort fee waiver for their golds and above (can’t be non competitive against Caesar’s) (maybe they raise it to platinums and above)
* Earn and burn on both sides
* MGM collection and the non-MGM collection MGM properties will be on the Bonvoy breakfast exclusion list (a la Cosmopolitan)
If there are matches:
* MGM gold/plat -> Bonvoy Gold
* MGM noir -> Bonvoy Platinum
* Bonvoy gold/plat -> MGM Pearl
* Bonvoy tit/amb -> MGM gold