Mario Kart 8 had previously received two DLC packs which were released between 2014 and 2015. The two packs were a huge success and were considered great by an abundance of review sites. The DLC was praised for it’s massive amount of additional content for a fairly low price, along with Now there have been quite a bit of rumors floating around that Mario Kart 8 will be receiving yet another DLC pack.
The rumor originated from a twitter post by Nintendo U.K. that included a picture of Kalimari Desert saying “Good things come to those who wait”. With #Mario Kart 8 (Although this particular stage is unlikely to appear because it was already in Mario Kart 7; we can still expect to see more DLC). From my perspective this can be taken two ways; the first one being that the U.K is going to get the game before the rest of the world, and the content will end up being region locked for a short amount of time to the other regions. Or option two they are just hinting at the DLC being near completion and we should just continue to remain patient for the time being.
Given that this was released from the Nintendo U.K. account I think option one would seem more likely, but fans will most likely just have to wait and see.