When do you think the new Azshara raid (Eternal Palace) will be released? I suspect that it'd be a little while after 8.2 to give people some breathing room after Battle for Dazar'alor and Crucible of Storms. Plus they want to release this raid as late in the summer holidays as possible as people finish their summer vacations.
Battle for Dazar'alor - 22 January
Crucible of Storms - 16 April
8.2 PTR - mid April
8.2 release - mid June
Eternal Palace release - late July