Creation of new forums is a topic for Talkboard to consider, and the thread has been moved to that forum.
In my view Ultimate Rewards does not yet warrant a separate forum:
American Express Membership Rewards is available worldwide. The USA version has 15 airline partners and 6 hotel chain partners.
Diners Club Rewards is available worldwide. The USA version has 15 airline partners, 7 hotel chain partners, and one railroad.
Chase Ultimate Rewards is a USA-only program with 4 airline partners, 3 hotel chains and 1 railroad. It's an aggregation of Chase's existing card issuing relationships. (Chase is the affinity card issuer for all except one of the UR partners.) American Express and Diners offer frequent transfer bonus promotions; Ultimate Rewards does not.
I still don't see the reason why UR should not be separate.