DL Plat would be great if they do upgrade it. I can almost guarantee we won't see Diamond Medallion out of it though. With the cozy relationship AmEx and Delta have, for them to offer an inferior status to US seems ridiculous, but not outside the realm of possibility. At the same time, if we were to lose CO Gold, I'd love to see something from the OneWorld alliance, even if it's not AA - I know that AmEx and BA are partners in Britain, so perhaps BA mid-level status?