SV does know that there were previous Elder Scrolls games that involved Hammerfell, but Redguard doesn't count because it's not an RPG, and Arena and Daggerfall are just old as ancient nordic halls
He think Elsweyr would be interesting, and honestly pretty likely given that everyone else loves the Khajiit so much (which he doesn't really understand, though he has nothing against them and likes to chill with the caravan merchants).
Hammerfell would also have desert aesthetics though.
SV also thinks that Akavir should be better left unexplored, at least for now. It should be left as a mystery, for tension. Also, he'd rather see more of Tamriel before the other continents come into play.
Also SV wonders what Sentinal has got against the elves...
Oh and spears are here
, along with other stuff. This isn't the video SV found before (which was better) but he can't find that one now. In any case, a lot of those things were in the 1.3 update (ranged killcams) or Dawnguard (lycanthropy skill tree, vampire stuff), so he thinks there's hope for the other stuff as well (like spears).