in the new files introduced with the 1.8 beta patch, in preparation for the dlc

I would totally commit murder for Daedric (Dai-)Katanas.

Wow, a lot has happened since yesterday!

I'm beginning to get a grip on what kind of DLC this is going to be. I hope it will meet the huge expectations!

And, Divayth Fyr will definitely be there. There's a Telvanni Tower involved, and he can access Apocrypha. I could even see a chance that the Telvanni are somehow fused with all things Herma-Mora related. Just take a look at the Telvanney-Hermy-Dragon Priesty mask.

maybe Dyvath Fyr has a chest full of them in his tower

If he don't died when the red mountain exploded, maybe also Yagrum Bagarn it's with him on Solstheim.
And his three "daughter\wife"

I'm not gonna expect him, but I'd love to see this board's reaction to Fyr possibly being in the trailer. Everybody would be beyond stoked.

It would be a real surprise. Maybe in his free time he torture Thalmor to the death.