Alleria Windrunner suicide after moment when Dark Portal was sealed from inside(all team "A" was in Draenor) she thot that they will never return to Azeroth and did that. Archmage Khadgar gone to Shatrat and now waiting for him destiny (His destiny was told in Karazhan-" You will be killed by orcs, Khadgar"), Kurdran Wildhammer gone to dwarwish settlement in Shadowmoon valley(Kurdran Stronghold now), Danath Trollbane gone to Hnor Hold to serve last humans in Draenor.