Basically, it also needs the TES feel of being a world totally foreign from our own.
I disagree with this. Certainly, there are times and places in Tamriel that are very, very different from the world in which we live, but going out of one's way to make something alien for the sake of being alien is just as bad as an unwillingness to go outside the familiar. Morrowind was the ONLY game in the series that was overtly alien, and even that had contrasts in communities like Ebonheart, Pelgiad, and Caldera. Arena, Daggerfall, Redguard, and Oblivion all had familiar fantasy tropes, and there's nothing wrong with that, so long as one isn't setting out to make a carbon copy of an existing setting.
Floating city = Summerset Isle
Isn't Summerset Isle known for its location to move/disappear?
As Lady Nerevar said, you're thinking of Artaeum (which is one of the Summersets, but not the main one). That would TOTALLY not fit the lore, IMO. More likely, in my opinion, is that the Necromancer's Moon is moving in on Nirn proper. Maybe there will be a God of Worms there; maybe not. But I strongly suspect the plot of this novel will explore the consequences of what the King of Worms accomplished in Daggerfall. Heck, it may be the result of the creation of a God/Realm/Planetoid by/for the KoW, followed by the cutting off of the head (the death of Mannimarco) in Oblivion, resulting in the God/Realm/Planetoid roving without any kind of direction.
Bethesda is making Novels for the Elder Scrolls!!!! Its a well known fact that the ADHD 13 year olds oblivion was targeted towards don't read books. Could this be a sign that bethesda are abnadoning the 13 year olds and coming back to us true fans that won't hold back the next game from achieving true depth, and lore!!!!Could this very well be a sign!!!!!
ZOMGROFLWTFBBQ!!!!111!111!1!one!!