This is just a discussion. Hopefully this doesn't seem like a reach.
As we know, Taylor is working on TS6. She told fans at the concert that she wants to release it as soon as possible and will when it's finished. We also know that every other Taylor album has features. 1989 had no features, so TS6 most likely will. As we know, Taylor first apple music commercial featured her running on a treadmill to a song from Drake and Future's album. Later on, Taylor had the concert... her first concert of 2016 and Drake liked and commented on all the photos from that night. Then she went to Drake's bday party and rumors began they were dating.... Taylor has a habit of working with people when they're in high demand or peaking -- Colbie Caillat, Ed Sheeran, etc. Lastly, both artists have deals with Apple/ Apple music. A collab between both would benefit apple music greatly.