Old Azeroth
Blizzlike

March 2016 -  Beta Phase opened to public

April 2016 -  Closed Test Registration & Open Beta

May 2016 -  Beta Prelaunch Tests

June 2016 -  Scheduled Release, June 1 2016

August 2016 -  Azuregos & Kazzak

November 2016 -  Dire Maul

December 2016 -  Alterac Valley

January 2017 -  Patch 1.6 - Assault on Blackwing Lair

March 2017 -  Patch 1.7 - Rise of the Blood God, Zul'Gurub

May 2017 -  Patch 1.8 - Dragons of Nightmare

August 2017 -  Patch 1.9 - The Gates of Ahn'Qiraj

September 2017 -  Patch 1.10 - Storms of Azeroth

January 2018 -  Patch 1.11 - Shadow of the Necropolis

February 2018 -  Patch 1.12 - Drums of War

The Alixium
Custom Instant 60

March 2016 -  Beta Phase opened to public

April 2016 -  Closed Test Registration

May 2016 -  Beta Prelaunch Tests

June 2016 -  Anticipated Release

July 2016 -  All Blizzard raid content available

August 2016 -  Introduction to Custom Raid Content

Warsong 1.5
Blizzlike Highrate

April 2016 -  Anticipated for future Release

May 2016 -  Beta Testing

June 2016 -  Release

July 2016 -  New raid content becomes available 1 week after the demise of each final boss.