Skyrim: new update reveals the existence of a future DLC
The thing is to be taken with the pliers since there is still no official confirmation, but according to some text strings in the file, we can make use of the new types of armor called Bomemold, Chitin, Nordic and Stalhrim. There will also be new missions in places such as: Raven Rock, Miraak Temple, Karstaag, Castle Tower and Telvanni Solstheim; This last is particularly interesting because it is an area between Skyrim and Vvanderfell where many Dunmer fled after the Argoniana invasion, then probably linked to Morrowind.
Another interesting clue is the presence of some files that begin with "DragonMounted", which suggests that the expansion will be unable to ride dragons.
In short, if this is confirmed the irons in the fire would be really great and very juicy, hopefully the rumors are confirmed and soon we bring this new expansion soon. As usual you should stay tuned for any updates.