Nintendo Europe appears to have stated an April 2014 release date for Mario Kart 8.
The game's release date was mentioned in a Nintendo Europe Newsletter, images of which quickly appeared on gaming forum NeoGAF.
Mario Kart 8 was revealed during Nintendo's E3 Direct stream, but was only given a vague spring 2014 release window.
CVG contacted Nintendo for a statement and it has not specified anything beyond the release window given at E3.
"At present we have the title down for 2014," said a Nintendo UK spokesperson.
The newest entry in the garlanded Mario Kart series introduces anti-gravity within the courses, allowing races to move to the walls and ceilings.
"In Mario Kart 8, we have implemented the mechanic of anti-gravity within the courses," said Nintendo president Saturo Iwata.
"Mario and friends can race up vertical walls and upside down in three-dimensional courses. You can also glide through the sky and race underwater, as in Mario Kart 7, or ride motorcycles like in Mario Kart Wii. Mario Kart 8 will offer the best collection of online multiplayer modes that the series has seen yet," he added.
"This time it's not just racing with other players, but sharing the fun of Mario Kart with others worldwide over Miiverse."
In our Mario Kart 8 preview we said: "At first glance, Mario Kart 8's looping, twining tracks seem to usher in a new wave of creativity to a series that's never quite been allowed to go stale, but has often driven closer to the 'best before' date than it needs to."