With Azshara's plan revealed by dataminers, it doesn't seem all that far fetched that Naga would join up with us as the new token evil player race. Tyrande probaly won't accept that, but she is ready to go on a warpath anyway. As far as I'm concerned every leak now that isn't about going after Sylvanas, is as fake as it can be.
FFXIV - Maduin (Dynamis DC)
Dragon Isles has had more reference as a location than any sort of death realm. We can easily have a world revamp expansion with Dragon Isles as zones (because cata theme: ESPECIALLY after they make it clear that Nzoth was Deathwing's master) AND deal with the death stuff in later patches.
They did it in Legion (Elf/Tauren Fun feat. Vrykul ---> DEMONS) and BFA (Pirate/Troll Fun --> OLD GODS) so they'll do it again.
Well we all have our favorites. If it were up to me I would revamp Gilneas into consisting of 3 or 4 zones and a bunch of plot lines that aren't really related to the worgen curse. Like The Witchwood story from Hearthstone. Drustvar could have worked perfectly as a zone of Gilneas.
Not much has been done with the Harvest Witches. Or Detective Halford Ramsay who could help us in murder cases like the Furlbrow murder or even the pre-cata Stalvan Questline.
A camp or something established by wandering Pandaren to give them monk trainers. Like a Spirited Away style Bathhouse obscured by dark mist. Perhaps even add a few naga to the shoreline as Brann Bronzebeard theorized.
As cool as the world getting bigger would be I think that if tey do a revamp it'll be on a smaller scale than even Cata. HD models and questline revamps. Maybe a bridge connecting the two Barrens, and put those fires out!
One thing I do think that a lot of people aren't saying is I think the Dragon Isles are merged into Eastern Kingdoms, not as their own loading screen continent. Maybe even something added to Kalimdor with the BFA-style 3-3 split.
FFXIV - Maduin (Dynamis DC)
There being no new zone in 8.3 makes me think a world revamp on some level is a lot more possible than before. Mechagon+Nazjatar is significantly less landscape than what we got in Legion (Broken Shore, all three Argus zones) which could be indicative that the world building team was pulled to work on something big for 9.0
Next expansion will be themed around love. Maybe we're finally going to Elune