Kat is adorable. End of story.
Since N64 Frappe Snowland appeared as a retro track in DS, we would see more of the DS's retro tracks like N64 Choco Mountain, N64 Moo Moo Farm, GBA Sky Garden, and N64 Banshee Boardwalk.Considering the post in the game, this is N64 Frappe Snowland. And it looks very different from the N64 and DS version.
I find it nice that Tour is finally releasing 3D retro tracks that were remade from scratch, I hope this trend continues.