I’m pretty sure Copping hasn’t said that. Infact, I’m sure I remember him saying somewhere (possibly TNM or the Jasta podcast) that he would consider bands like KoRn as co-headliners.
KoRn will headline at some point. They’ve never been more revered than they are now or more at the top of their game. They deserve to headline.
There are so many bands around who will / might have new material out in time for next year that would take up big slots. Ghost, Gojira, Deftones, Lamb of God, Alice In Chains, Halestorm.
Then you’ve got bands who have new material out now but haven’t been booked for this year like Judas Priest, Stone Sour and Trivium.
I think Code Orange will get a mid Main Stage slot.
Headliners wise, Rammstein are in he studio and are always a no-brainer if they’re available.
Metallica seem the obvious one and Slayer calling it a day, I really can see DL booking them and the rest of the Big 4 and billing it as the final chance to see them all together in the UK.
Tool I really do feel they will have an album out in 2018 and if they’re around surely they will get booked. Tickets would fly out because of how rarely they’ve been here and how dedicated their fanbase is.
Maybe something like this:
Tool / Deftones / Lamb of God / Gojira
Metallica / Slayer / Megadeth / Anthrax
Rammstein / Judas Priest / Stone Sour / Alice In Chains
It feels weird leaving Trivium out, though.