Flexible will be called Normal and have the current Flexible mechanics.
Normal will be called Heroic and have the current Flexible mechanics.
Heroic will be called Mythic, and be a strict 20-player setting.
HUGE announcement. This is going to have a lot of mixed opinions and feelings, but I’m personally happy to be rid of this silly, sour-tasting 10 vs. 25 thing that’s plagued WoW since Cataclysm.