I would also like a light blue Yoshi! But I think it would be no fair to have a Christmas Yoshi, because last year it was Yoshi. So I really think a Holiday shy guy would be neat.
Prediction:
Christmas Tour
Winter Tour
Reasoning:
White Yoshi looks like snow and would be a good Frosty The Snowman.
Cobalt Blue Yoshi
Prediction:
Winter Tour
Summer Tour
Reasoning:,
Blue could make a good Winter or Summer Tour Yoshi.
Prediction:
Spring or Easter Tour
Christmas Tour or Winter Tour
Summer Tour
Reasoning:
Spring or Easter Tour because its one of egg blues. Winter because its the color of Ice Mario. Summer because he's one of tropical yoshies like Pink.
Prediction:
Easter Tour
Reasoning: Yellow looks like Spring daisies and its a traditional color of Easter.
Prediction:
Easter Tour
Summer Tours
Reasoning:
Easter because Pink along with light blue and yellow are traditional colors of Easter eggs and colors. Summer because Pink is a tropical Yoshi.
Prediction:
Halloween Tour
Fall Tours
Summer Tour
Reasonings:,
Orange Yoshi would be perfect for Fall, but he is also a Tropical Yoshi like Light Blue and Pink which works for Summer.
Prediction:
Halloween Tour
Spring Tour
Reasonings:
Purple is a traditional color of witches and ghouls so that works for Halloween Tour, or Spring because purple flowers bloom then.
I doubt Brown Yoshi would be added to Mario Kart Tour.
This is not something we have seen before, plus all these presents and the factories on the left make me think of a Santa's presents factory... highly imaginative recreation of a real life location? The first non-city new course? What is this even..
P.S.: well, there is something new for sure: if you look at the center in the full resolution image you'll see a wooden bridge with item boxes, so for the first time since a lot of years we might have the first mountain track in which we aren't sent upwards by a cannon?