Seems like the cat jumped out of the sack before Mythic could post their large announcement. Reading at eurogamer.net, GOA has announced a big "Call to Arms" update. The news include Orc Choppa and Dwarf Slayer confirmed (in March, early access throuh live-event again), a Land of the Dead zone (in June) which includes an enormous new Tomb Kings dungeon (accessable through a Darkness Falls mechanic: whoever controls the area will unlock the public quests and instances associated with the zone). Two previous live events are needed to be completed by the realms to gain access.
Now lets hope we'll get some more in detail information (and pictures) about the stuff...
Updates from Mythic:
CALL TO ARMS Live Expansion
WAR Live Event: Night of Murder
WAR Live Event: Bitter Rivals