Skyrim fans have been data-mining patch 1.8 for hints at future updates and posted some very interesting tidbits on the Bethesda forums . The files contains quest markers for the island of Solstheim , the setting for the Bloodmoon Morrowind expansion pack. Bloodmoon locations like Castle Karstaag and Raven are listed alongside new animation entries that hint at mounted dragons.
Animations listed include entries like "DragonMountedDualStaff," which suggests we might find ourselves fighting warriors dual-wielding magical staffs from dragonback. There's also mention of new weapon crafting recipes for Bonemold, Chitin, Nordic and Stalhrim armour. The data is linked to the name DRAGONBORN in the file structure, which Bethesda trademarked earlier this year.
This hasn't been officially confirmed by Bethesda yet, but early details on the Skyrim Dawnguard DLC were obtained in the same way when fans discovered mention of crossbows and vampire lords tucked away inside an official patch. The Solstheim setting would be a sensible way to expand Skyrim given that it's snowy, mountainous, and populated by Nords. Thanks to OXM for the heads up.