This is an even farther stretch, tho we can hope. In particular, the one I first thought of is Elsweyr Anequina, now on AFK:
https://www.afkmods.com/index.php?/files/file/2170-elsweyr-anequina/
Possibly the greatest 'new land' mod. And it has plenty of quests - It even has mods of its own, some here on Nexus. But I wouldn't expect to see that turn up for ObRem in a hurry, well it's up to Iliana, but I don't think it would be a small job. Of course, there are many other fine examples like the TWMP province mods, none of them minor tasks.
[Minor note. but relevant to this topic: no matter what I do with the oblivion.ini file, I have not been able to disable borders, which is usually the very first .ini tweak I'd apply. Altered both the Documents and the Steam instances, but no luck. Wonder if anyone else has had the same issue. I'd really like to take a look at those empty lands out there...]