Harvey would never promote/campaign Meryl for supporting, hence why this year she was promoted as the only lead actress during awards season for August : Osage County even when she was clearly supporting/co-lead.
So probably she's still supporting, but Harvey's propaganda machine won't let us know that
The full Taylor mention in Ryan Tedder's Billboard cover story
Quote:
Billboard: Ryan Tedder co-write to appear on Taylor Swift's fifth album
While OneRepublic has been touring Europe for the past month, Tedder has continued his creative tear. He recently finished two singles for Ariana Grande’s sophomore album, a new OneRepublic single called “Love Runs Out,” due for release later this spring, two songs for the forthcoming debut from Mikky Ekko (the songwriter and hook vocalist on Rihanna’s “Stay”) - and, oh yeah, a song for Taylor Swift’s next album. “I did one or two other songs that I’m leaving out,” he says before later confirming his latest finished product, a dance anthem with vocals from Elton John, produced and co-written with Swedish House Mafia’s Sebastian Ingrosso and Axwell for an as-yet-undetermined project.
……..
Many of the songs started out in other cities at other times - the John collaboration more than a year ago, the Swift session in late January during Grammy Week - but Tedder draws upon he inspiration of the road to put the final ribbon on his tracks.
hopefully for LP5 promo 
and she looks great 
