Anduin won't return to Stormwind, but he won't stay in Oribos either. Most likely it will be in 10.0 on the dragon islands as in pandaria. He has a new encrypted model, why do it if he was abandoned.
Yeah, turns out he doesn't actually say he's staying in the Shadowlands. Just not coming back home to lead the Alliance. Up for grabs as to where he goes.
Wrathion romantic subplot time.
This does seem to confirm that there is nothing about "lol leave and never return". So unless the devs hastily write that in because of Lore forums and Red Shirt Guy tweets, the Shadowlands are semi-open.

Alleria looks at Sylvanas with scorn, anger, contempt, which makes sense after all the crimes she's committed. Vereesa looks at Sylvanas with sadness, pity maybe, she seems on the verge of tears. Which also makes sense, since Vereesa is a pathetic crybaby.
I mean, if we're leaving the Shadowlands (which in all likelihood we are, since the expansion is ending) and he's staying behind that means no more Anduin on the forefront.
If he's leaving the Shadowlands but not leading the Alliance/SW, that might mean we'll actually see -more- of him.
Anduin needed a break. Hope he doesn't come back for awhile.
I'd say 50/50 is encrypted model is his traveling gear OR he's in some kind of Kyrian robe and will be staying there to meditate with Uther. We shall see.
If they are retiring Sylvanas so definitively I can see him staying behind as well.
With this, it is confirmed that Turalyon will fully assume the role of Supreme Commander (= High King) of the Alliance, with Alleria as his chief advisor in the War room, which btw is next to the Throne room.
Great things are ahead for the Alliance, I don't know if the next expansion will excite me gameplay-wise, but it surely will excite me lorewise. Soon my long wait will come to an end.
YOU HEAR THAT PHOTOSHOP WITCHES? Get m'boys on that hypetrain! @Arafal work your magic!![]()