Oo that's right.
But we ain't gonna go to OL again, and Karesh was the one that was ravaged by the void. So it's make sense that it's most likely a void stronghold.
And Karesh definitely is still around as the ethereals still operate there. As referenced in that timed world event in blades edge.
Would be a prime location AU xera might wanna go to after being pulled to our timline.
The way it might go down would be this.
Yrel meets with Turalyon and at first they prob get along.
But then comes his void wife and locus walker, and that's where shit probably hits the fan.
Locus walker and alleria get kidnapped and forced to open the way to karesh.
I'm thinking also that the events of SOTFO caused a rift that divides the 6 forces. Perhaps karesh might be a good place to exploit that rift and AU Xera, being an almighty cosmic being, is aware of this and commands yrel and the LB to go there to eradicate the void.
They prob end up doing the opposite, which paves the way for azeroth to be corrupted by the void, as sargeras feared.