I think one of the files mentioned a telvanni tower, and IIRC, that old thread didn't say they were still present.
I was very excited when I first heard that the next DLC would be on Solstheim, but at the same time dissapointed that they would make an expansion that was already made less than a decade ago. I would also prefer if they came up with new lore/cultures, instead of re-using the Dunmer. I think Beth's creativity has gone way down, and now instead of creating new interesting things, they are looking backwards for it.
If we do indeed return to Solstheim, we will likely get some more Dunmer stuff, but I think that's what many fans want after they suffered such radical changes after the events of Oblivion and onwards. Things could be very different. Interaction between surviving Dunmer (and all their Boeth-ala politicking) with the Skaal, as well as seeing what happened to the budding Raven Rock colony, will be an interesting thing to see. It may be titled "Dragonborn", so I think that even if we return to familiar soil, the change in climate may be pretty drastic.
It does indeed look pretty convincing... and now is probably the most interesting time to visit Solstheim. I may be a pessimist, so I shall just hope that it is adequate. Also, http://www.gamesas.com/topic/1361197-pentannual-census-of-the-houses-of-morrowind-post-red-year-4e-166/ is the thread you mentioned. before my time, haven't read it yet.
It's an excellent thread.