An interesting blog post put up for anyone wanting to read it. Certainly sounds like a pretty unique and engaging fight. I hope it translates well in terms of gameplay
https://www.guildwars2.com/en/news/knocking-on-jormags-door/ (be warned it pretty much lays out the fight for those not wishing to be spoiled)
It feels a little soon to be taking on the Citadel imo and the entire Frost Legion, but the blog does make it sound like a lot of interesting things will be going on to get stuck into.
What sleep is here? What dreams there are in the unctuous coiling of the snakes mortal shuffling. weapon in my hand. My hand the arcing deathblow at the end of all things. The horror. The horror. I embrace it. . .