I haven't seen a thread yet that discusses what the effects of this altered timeline will be on the history of azeroth as we know it. Here's a few examples, and feel free to add any others.
-No Lich king. If Ner'zhul never gets overthrown by gul'dan, he never gets tortured by kil'jaeden, and therefor never becomes the lich king. So None of the Lich king Story line (including an entire expansion) ever happened.
-Stormwind was never destroyed, and therefore looks completely different than it does currently since it never had to be rebuilt.
-Ever single piece of WoW lore involving orcs on azeroth never happened.
-The Alliance doesnt exist. The only reason the alliance formed was out of the need to defend themselves against the orcs plowing through the eastern kingdom. Without the threat of annihilation, only the bickering kingdoms of lordaeron would still remain.
-The entire forsaken race doesn't exist. With no Lich king story line, there are no undead.
-Blood elves still live happily in Quel'Thalas, never joinging the alliance or the Horde.
-Tauren would be either enslaved or extinct. They were in bad shape when Thrall found Cairne in WC3, and without the orcs help, they would have been overrun by the centaur.
-None of the sha would have ever been uncovered in MoP as the war would never have come to the shores of Pandaria. Therefore the whole continent would still be haunted.
-There would be no paladins. The Silverhand was only formed in an attempt to counter the deathknights of the horde. Again, if there's no neccessity, nothing is ever done
-Blackrock Spire never existed and therefore the black dragons would be relocated elsewhere and Leeroy Jenkins would have never had chicken.
Basically, all of Warcraft lore as we know it no longer exists. I'm just looking for specific examples such as the ones listed above.