I am big for the Ilsabard/Othard in 7.0 theory. It would definitely help to address some concerns after the fall of the Empire, which has been brought back up as of this patch. It feels fitting to 'clear' the Three Great Continents before we go to the other two.
Thancred has gone to help in the provinces including both Ilsabard and Othard post Endwalker, from his dialogue regarding his brief and almost suspicious appearance in 6.1 despite not taking part in the dungeon. It seems likely the client contacted him during his finishing up in Othard, before making the long trip back to Sharlayan (recall, he's incapable of teleportation).
There's plenty to be seen in both continents. Landis is a large part of Ilsabard, given the many cities that lie within the nation's borders, so I find it likely we'll be heading there with maybe a trip to the once-mentioned Nhalmasque as well, and of course visiting Corvos. I don't see any reason to fully dance around Dalmasca however, we still have Lea Monde as one of the major capitals which has been mentioned since ARR. There's of course Nagxia, with references to some former Scions going to it after Endwalker, and room for Golmore/Valnain. We could potentially take a trip to the Dalvalan Grath, since its just near the 'treasure islands' of Blindfrost that Emet mentioned.
I do agree though that with the existence of Fanow and Rak'tika, it doesn't seem very necessary to have yet another Viera village. I find it more likely that Erenville may be from one of Dalmasca's cities or towns neighboring the jungles instead.
I imagine that when it comes to the South Seas and Aerslaent, we'll see them with the Meracydia and New World expansions respectfully, as places we stop in briefly on our journey over (giving Aerslaent's very much norse influence, I find it likely they've explored the New World as their own equivalent to Vinland).