I've been speculating quite a bit recently and I think that I may actually be onto something. I'm probably wrong, don't get me wrong but I thought I'd share.
I believe Blizzard has tested out a concept they wanted to integrate on a bigger scale into their next expansion during the last patch of their current expansion quite a few times in the past. Think this was the case with the Timeless Isle as well, to some degree. I think that's exactly what they're doing with the Teleportation Beacons. You can't really get from one zone on Argus to another without using these. I think this'll be integral to the next expansion.
I believe we'll have our own ship, which will serve as our base of operations, and it'll be used to get from one zone to the other. The zones will all be islands. To further back up this idea, from leaks, we already know that Kul Tiras will be a zone in the next expansion, Kul Tiras being an island. To add onto this, there's a few more zones that we can expect in the next expansion.
Tel'Abim. Muffinus was chatting shit on Twitter about how every single speculation thread has to include Tel'Abim, an island known only for having bananas. And took those memes pretty far. So I'll be fairly disappointed if they don't come true, it just seems to fit in so perfectly.
Another place we're very likely to see in the next expansion is Nazjatar. Sargeras ends up stabbing Azeroth in 7.3, making a massive hole, and, as Khadgar points out, many factions will be fighting for possession of the blood of Azeroth. And, as we all remember, the blood of Azeroth was what made the Well of Eternity in the first place. The Well of Eternity being deeply tied to the Night Elven Empire, with Queen Azshara as the ruler. Queen Azshara and the Well of Eternity have such close ties that I'm almost one hundred percent sure that Queen Azshara will play a role in the next expansion, which means Nazjatar probably will as well. And, quite frankly, we won't really casually be walking to Nazjatar, we'll need a ship to get there. I think you see where this is going.
Dragon Isles. This being a part of the next expansion seems pretty likely. They're a pretty old concept and will most likely change quite a bit (as a matter of fact, we basically know nothing about Dragon Isles right now), but, in my opinion, Dragon Isles will show up in the next expansion and will have deep ties to the Dragons themselves, which would make sense considering the fact that Ion literally confirmed them having a part in the next expansion.
Other than that, Kezan and Zandalar all make sense to be a part of the next expansion. Both of which are islands. Which I think further reinforces the idea that we'll have a ship which we'll use to get from one zone to another.
Thoughts?