A user on the themeparx found an image possibly showing the layout of Super Nintendo World in Orlando!
The image is 100% real, it was the concept art that was originally pitched to Nintendo, however not all of that has made the final cut. The rides that have evidently made the final cut are Mario Kart, Bowser Mine Cart and Yoshi dark ride.
The concept art was posted on Twitter by @thatsjustgary who seems to been given the art directly by Comcast, he's also posted this image which relates to the Mario Kart ride
A new patent has been found which appears to be linked Mario Kart although insiders on IU don't think the guests will be back to backhttp://www.bizjournals.com/orlando/news/2017/06/15/latest-universal-patent-hints-more-about-nintendo.html?ana=twt
Everything seems to point to this being an incredible ride, now we just need it to get built!