Unlikely. Citi owned Diners Club International for three decades, and still operates some of the card-issuing Diners Club franchises, although they sold the Canada/USA franchise. This gives Citi mile purchasing relationships with a couple dozen airlines in multiple markets worldwide. I think it's likely that they can add most any program they want if the airline or hotel chain does not have an exclusive contractual tie to another USA based card issuer.
+1 Great Point.
I was saying maybe it is the ThankYou Rewards program itself that is the problem. Maybe it is limited by Citi for a reason. Obviously pure spec but back to man topic.
Still pumped for April to see what happens with the announcement.