I kinda want the expansion to end the way it started; with a blink spell. Except this time we expend the power we've been gathering in all the artifacts to blink Azeroth itself across the cosmos, causing the Legion to lose our position, pissing them off and buying ourselves a few years where we can realistically explore local threats/the Void without having to ask why the infinite Legion has stopped attacking if they know where we are. Plus it would make the next time we see a wild demon a lot more of an oh shit moment, as it's a threat to our safety again, and this time we have less heroes and artifacts on our side.