Next female vocalist headliner

There was a big deal maxe about Emily being the first female vocalist to headline Download. Ive had a few chats since then as to who could be the next and general consensus was no band was quite big enough to take the slot.

Paramore definitely could but have moved into a much softer sound in recent years.

Evanescence, Halestorm and Spiritbox all play Arenas but none of them are sellout.

Within Temptation, Nightwish, Poppy, Lacuna Coil all put on excellent shows but seem to be fairly niche.

Who do you reckon will be the next and do you think Download will try and continue the trend or fall back to moving up the biggest draws instead (ie Limp Bizkit, Sleep Token, Korn)?