A total of 26 of the 32 tracks in Mario Kart 8 have already been revealed, but recent footage suggests that Yoshi Valley from Mario Kart 64 and Sherbet Land from Mario Kart: Double Dash!! are set to appear in Mario Kart 8 as two of the three remaining retro tracks.
In the track Sunshine Airport, arrival and departure times and locations can be seen on the screens within the airport. When Sunshine Airport was first announced, these screens were used to determine the names of other tracks, as all the locations were actual tracks found within the game. In the most recent footage of Sunshine Airport, Yoshi Valley and Sherbet Land can be seen listed among other confirmed tracks.
Do you think these two tracks are in? The terminal screen has yet to be wrong! And what do you think the very last unrevealed retro track will be? My vote is on GBA Ribbon Road!