Dre is a massive music fan and has never been to Glasto AFAIK. This is the first time one of his proteges has headlined so I wouldn't completely rule it out. If he has some Apple Music, Beats or something else he's doing himself to promote in Europe this summer, he might actually want to do it. I'm sure he's well aware of the significance of the festival.
Young Fathers - Cocoa Sugar Orbital - Monsters Exist Villagers - The Art of Pretending To Swim Pusha T - Dayona David Byrne - American Utopia Anderson.Paak - Oxnard Gruff Rhys - Babelsberg Janelle Monae -Dirty Computer Hookworms - Microshift The Good, The Bad, And The Queen - Merrie Land