While the trademark is for "computer game software for use with computers and video game consoles; downloadable computer game software offered via the internet and wireless devices," it could of course be for another title, but that just wouldn't be as fun, would it?
Mythic Dawn Guards appeared in The Elder Scrolls IV: Oblivion. They're apparently members of the Mythic Dawn cult, which worships Mehrunes Dagon, the daedric prince of destruction.
The Unofficial Elder Scrolls Pages says they're responsible for the assassination of Uriel Septim VII and their main objective is to allow Daedra to invade Tamriel by opening Oblivion Gates in order to take control of the continent.
Last month Bethesda's Todd Howard hinted at potential Skyrim DLC by showing off some of the fruits of the company's week-long 'Game Jam', an annual tradition that lets developers at the studio go wild with their imaginations on company time.
In December he also said Skyrim DLC will focus on "ways to make the game better, not just have more, because the game is so big". As with Bethesda's previous titles, there'll be multiple DLC packs with "a lot of meat on them".
Microsoft has secured Xbox 360 timed exclusive releases for the first two DLC add-ons for Skyrim.
Here's what we want to see from Skyrim DLC.