Couple of weeks ago, I wrote about SPG Crossover Rewards that were coming this spring. I had an educated guess that it would have something to do with an airline and/or car rental company.
I have now made an updated post about this program after the official launch.
The SPG PLT Delta flight upgrade benefit that was included on the version of the terms and conditions that I had access to, is not not included in the final version.
Edit (09/12): The upgrade benefit for SPG Platinum members has now been included on the program.
Now, I have more information about this product. Starwood Preferred Guest Gold and Platinum members will receive certain benefits on Delta marketed and operated flights such as Starpoints based on the spend, upgrades, priority boarding, and waived checked bag fees.