According to data mined by a Skyrim forum member the next bit of Skyrim DLC may be titled Dragonborn, and it might take place on the island of Solstheim.
There are indicators that the possible chunk of extra content will include the ability to mount dragons, though this could just be evidence of scripted rides. The data also points to a few new types of armor: Bonemold, Chitin, Nordic and Stalhrim, oh and mounted spell casting may be coming too.
A bunch of location names were discovered such as Raven Rock, Miraak Temple, Castle Karstaag and Telvanni Tower. There’s even a mention of PS3 DLC (let’s hope guys). Further evidence to back up the claims can be found here, where Zenimax has filed an application to trademark Dragonborn.
Bethesda forum member Mardoxx is person responsible for the find. He had a poke around patch 1.8 in search of answers and it seems he found some.
data\interface\Translate_english.txt
$Crafting_$DLC2ArmorBonemold BONEMOLD
$Crafting_$DLC2ArmorChitin CHITIN
$Crafting_$DLC2ArmorNordic NORDIC
$Crafting_$DLC2ArmorStalhrim STALHRIM
$Dragonborn Quests Completed Dragonborn Quests Completed
$DRAGONBORN_ESMName Dragonborn
$DOWNLOADABLE CONTENT_PS3 DOWNLOADABLE CONTENT
Update.bsa\meshes\animationsetdatasinglefile.txt
DragonMountedDualMagic.txt
DragonMountedDualStaff.txt
DragonMountedMLhSolo.txt
DragonMountedMLhStaff.txt
DragonMountedMRhSolo.txt
DragonMountedMRhSolo_ShieldOrTorch.txt
DragonMountedMRhStaff.txt
There are a few new creatures too, apparently, but Mardoxx deemed them “not that interesting” so we don’t know what they are.
The original thread discussing the find was locked by Bethesda but a new one has been made in its place.
Solstheim, an area seen in previous Elder Scrolls game Morrowind, was actually accessible in Skyrim a long time ago in lo-res, Bethesda even admitted they might use it someday.