Didn't he want to invade Azeroth? We killed Blackhand, Kargath, Garrosh, and many more of his soldiers. Then after Blackhand dies, Gul'dan gets tired of his bullshit and roflpwns him and sprays Tanaan with his green juice and takes Grom prisoner. Cue Hellfire Citadel raid. Okay, I guess I can kind of understand the events here. The enemy of my enemy is my friend, so he teams up with us to kill Archimonde and defeat Gul'dan. But... After that, it seems like he forgot all about his plans for conquest. He's cheering with us and acting like we're the best of buds. After Archimonde dies, why doesn't he go back to his original plan and end our temporary truce? What made him change his mind?