Taiwan's game rating board has revealed the existence of a Trials off-shoot.
Trials of the Blood Dragon leaked by Taiwanese rating board
Trials of the Blood Dragon is the name of new Ubisoft game that's yet to be officially announced.
The name appeared on the Taiwanese rating board website earlier, before getting removed. The page previously showed the game for PC, PS4, and Xbox One, with Ubisoft as publisher.
Here's screenshot of the removed listing, via @Lifelower.
As the image suggests, this is clearly a Trials spin-off, possibly set in the Blood Dragon universe. Blood Dragon was a Far Cry 3 add-on that was very successful for Ubisoft.
The Taiwanese rating board has had a decent track record recently. From the yet to be announced Bioshock: The Collection, to the already available PS4 and Xbox One versions of ZombiU and console versions of Dirt Rally.