Perhaps you could choose to fight WITH the Dragon Priests? I doubt it, but it certainly would be interesting!
Right. It's implied, but never said. I would love to reestablish the Dragon Cult!
I'm staying faithful to the Scales
I suspect it will be available as a boat ride from Windhelm, similar to the way that you could get there in Morrowind. In Morrowind you could go there right from the get-go, but you were advised not to do so until you were higher level (I think was about Lvl 20 from memory)
The obvious new faction for Solstheim would be to do something with the East Empire Company, although they already did that with Bloodmoon, I hope it won't be the only faction
Wouldn't that be cool if the boatride WAS the loading screen? :D