Actually, you'll be going to Solstheim. An island that's somewhere between Skyrim & Morrowind, as Morrowind was devastated by the Red Mountain and refugees made their settlements there. Funny thing is that Solstheim appeared in the Morrowind expansion 'Bloodmoon'. Yeah I'm excited for it as well. It is also possible you will get to wield spears again. Wish they could bring back Levitation as it's pretty fun flying up to out of reach places.
DAMN IT BETHESDA! Y U MAKE SO MUCH CONTENT?! I'M STILL TRYING TO GET THROUGH THE VANILLA GAME!
I'm one of those guys who likes to explore every possible avenue of an RPG, thus is prone to make multiple characters of multiple skills. To that end, I haven't actually finished the Skyrim questline. Oblivion was the same way.
Seriously, these games will be the death of me.
As to the trailer, it's kind of nice to see dragon riding in the game, but being a PC user I've seen a lot of mods out there that do similar things to what the expansions have done, so really the only intriguing thing is this conflict with the first Dragonborn.
My only request for modders, if this DLC has a final boss fight, replace the fight music with Queen. The reason being...
It'll be interesting to potentially learn more about the Dragon Cult, the main game didn't really provide enough details about them to satisfy me. It'll also be fairly interesting to learn more about this other Dovhakiin. He looks... Intimidating. Also, I hadn't really thought about it myself but now you mention Hermaeus Mora having a bigger role... I suppose that'd explain the abundance of tentacle-y things in the trailer.