We all know about how people thought Redguard was the name of a Skyrim DLC, but what if it's the name of the next TES? That would seriously explain why the trademark was renewed. What do you guys think? Do you think it may be the reason for everything that went on, or am I just sipping on too much skooma?

It was already the name of a spinoff game released between Daggerfall and Morrowind.

No, TES VI already so soon? and if it was Hammerfell then the name would be Hammerfell not Redguard. thats like saying Skyrim should've been named Nord. and Oblivion, Imperial and Morrowind, Dunmer... well you get the picture.

Or most probably they were trademarking the name due to their earlier made game, Redguard.

This. Pete Hines confirmed on Twitter that the trademark renewal was done to protect older assets. Nothing more, nothing less. Nothing to really see here, unless they plan to re-release Redguard at some point, which hasn't happened so far.

There are no trademark filings for TES VI yet last time I checked. That's not going to happen until they actually start developing the game, which won't be until they finish the last piece of DLC for Fallout 4 or whatever their next game is, assuming the game after their next one is TES VI of course.

It was Bethesda renewing the Patent for the game http://www.uesp.net/wiki/Redguard:Redguard

They have done this in the past.