Is this the expansion you want? Time travel to Draenor before the explosion, it got saved from destruction and now you're back in the present with a whole different looking Draenor.
A full planet this time, a lot more Draenei in it, hidden, a lot more brown orcs too, it's had a generation to grow since being cut off from Azeroth - remember Azeroth and the events on it remain unchanged.. what is re-written is Outland, the fate of Alleria and Turalyon is finally explained.
Only Draenor is changed, not the Azeroth time line, which means the fate of Illidan, Kael'thas, the Sunwell and everything that happened in TFT & TBC concerning Outland happens differently. Yes Kael'thas is missing from Azeroth and the Sunwell is restored there, but there are differences now in what happened.
There is a new legion invasion of that world, and this is the main thrust fo the expansion...
Is this the expansion you want?