I think Billie Eilish could headline, at Sziget even the sub plays 90 minutes so if they want her she'll make it happen, maybe with guests? She's too big to even headline A38.
I would love a Biffy Clyro - Kasabian - Foals day!
Hmmm as I might actually mae it next year I'll go with a headliners prediction.
Mumford & Sons
Christine & The Queens
Some rock, some rap, some pop. I hope there won't be an EDM DJ.