So I just finished the series of quests where the PC escorts Mayla Highmountain and Ebornhorn through Neltharion's Lair in Highmountain and they receive 3 visions. The visions were said to be just after the war of the ancients as "for Huln the War of the Ancients did not end with the Well of Eternity" so we see him go into Deathwing's lair and claim the hammer of khaz'goroth and then... he uses it to banish Deathwing to Deepholm.
Now, I'm not done with Highmountain yet but this has me scratching my head because as far as I knew Deathwing was around in 2nd war and in fact according to WoWpedia "After a series of setbacks, culminating in his defeat at the hands of the other Aspects, Deathwing retreated to the elemental plane of Deepholm to recuperate." during the 2nd War. So what the hell is really going on with Deathwing I assumed that once Deathwing first entered Deepholm that he didn't leave again until the start of Cataclysm, however, the Highmountain storyline suggests that Deathwing got his plates put on by the Drogbar slaves and then was banished later by Huln which would've been about 10,000 years ago just after the WoA. So if this was the case how the hell was he in the 2nd war?