Secret Miiverse community found
According to the Mario Kart 8 Miiverse community description, the community has been opened ahead of launch for preview purposes. The only members allowed to post and comment are those of Nintendo and select members of the media, such as IGN\’s Greg Miller (as seen below), Peer Schneider, and Jose Otero. As such, the community cannot be viewed without using this link. A few members of the media who have access to the game can be seen below.
— Greg Miller (@GameOverGreggy) May 2, 2014
— Greg Miller (@GameOverGreggy) May 4, 2014
The community will be officially opened to the public when the the game officially launches on May 30th. Until then, check out these screenshots of the game taken by those who currently who currently have early access to the game. They are compressed by Miiverse so they may not look as detailed as the ones you\’ve seen before.