I am definitely more curious about
:
1 - dynamic reward or not - I would be surprised if they don't implement this
2 - lifetime status - I hope my Marriott LT Platinum + SPG LT Gold yields LT Platinum Premier
3 - cross-overs with US airlines - DL or UA or both?
4 - travel packages - especially given
#1
5 - stay related benefits - 4 PM check out, Your 24, Lounge Access, free breakfast/resort exclusion
6 - other partner arrangements