So far, we have 3 confirmed from the most recent trailer:

1. Luigi's Mansion (DS)

2. Airship Fortress (DS)

3. Maple Treeway (Wii)

This excites me, because the retro courses have almost consistently been crappy choices, but so far these look to be better. 

Now with this information, let's predict what the other 13 courses will be and possible justifications. Whoever gets the most right wins.... bragging rights? If someone comes up with a better incentive, then we'll work with that.

Ex.

1. Coconut Mall (Wii) - The numerous ramps would fit perfectly with the gliders that were recently implanted.

2. Wario Colluseum (GCN) - The 3D effects of the entire things would be an excellent display of the 3D capabilities.

3. Yoshi Valley (N64) - I REALLY want it in!

etc.

Courses from each game left: (Crossed Out = Used, Underlined = Will be in Mario Kart 3DS)

Mario Kart SNES///Mario Kart N64///Mario Kart GBA/// Mario Kart GCN///Mario Kart DS///Mario Kart Wii

Mario Circuit 1///Luigi Circuit///Peach Circuit///Luigi Circuit///Figure-8 Circuit///Luigi Circuit

Donut Plains 1///Moo Moo Farm///Shy Guy Beach///Peach Beach///Yoshi Falls///Moo Moo Meadows

Ghost Valley 1///Koopa Troopa Beach///Riverside Park///Baby Park///Cheep-Cheep Beach///Mushroom Gorge

Bowser Castle 1///Kalimari Desert///Bowser Castle 1///Dry Dry Desert///Luigi's Mansion///Toad's Factory

Mario Circuit 2///Toad's Turnpike///Mario Circuit///Mushroom Bridge///Desert Hills///Mario Circuit

Choco Island 1///Frappe Snowland///Boo Lake///Mario Circuit///Delfino Square///Coconut Mall

Ghost Valley 2///Choco Mountain///Cheese Land///Daisy Cruiser///Waluigi Pinball///D.K. Summit

Donut Plains 2///Mario Raceway///Bowser Castle 2///Waluigi Stadium///Shroom Ridge///Wario's Gold Mine

Bowser Castle 2///Wario Stadium///Luigi Circuit///Sherbert Land///DK Pass///Daisy Circuit

Mario Circuit 3///Sherbert Land///Sky Garden///Mushroom City///Tick-Tock Clock///Koopa Cape

Koopa Beach 1///Royal Raceway///Cheep-Cheep Island///Yoshi Circuit///Mario Circuit///Maple Treeway

Choco Island 2///Bowser's Castle///Sunset Wilds///D.K. Mountain///Airship Fortress///Grumble Volcano

Vanilla Lake 1///D.K.'s Jungle Parkway///Snow Land///Wario Colluseum///Wario Stadium///Dry Dry Ruins

Bowser Castle 3///Yoshi Valley///Ribbon Road///Dino Dino Jungle///Peach Gardens///Moonview Highway

Mario Circuit 4///Banshee Boardwalk///Yoshi Desert///Bowser Castle///Bowser Castle///Bowser Castle

Donut Plains 3///Rainbow Road///Bowser Castle 3///Rainbow Road///Rainbow Road///Rainbow Road

Koopa Beach 2///XXX///Lakeside Park///XXX///XXX///XXX

Ghost Valley 3///XXX///Broken Pier///XXX///XXX///XXX

Vanilla Lake 2///XXX///Bowser Castle 4///XXX///XXX///XXX

Rainbow Road///XXX///Rainbow Road///XXX///XXX///XXX

Here's the E3 trailer for reference:

Wasn't that track with the jumpy flowers/mushrooms in MK Wii?

Honestly, I just want the game in my hands. However I do hope they bring forth some of the N64's finest.

OMG we need that 3 level battle course, the one with the four square sections of different colors, from the N64, and it was also in the MKDS.

THAT'S THE BEST EVER!!!!

Shell Cup
Mario Circuit 1 - Super Nintendo
Moo Moo Farm - N64
Peach Circuit - Game Boy Advance
Luigi Circuit - GameCube

Banana Cup
Donut Plains 1 - Super Nintendo
Frappe Snowland - N64
Bowser Castle 2 - Game Boy Advance
Baby Park - GameCube

Leaf Cup
Koopa Beach 2 - Super Nintendo
Choco Mountain - N64
Luigi Circuit - Game Boy Advance
Mushroom Bridge - GameCube

Lightning Cup
Choco Island 2 - Super Nintendo
Banshee Boardwalk - N64
Sky Garden - Game Boy Advance
Yoshi Circuit - GameCube

Shell Cup Banana Cup Leaf Cup Lightning Cup
GCN Peach Beach N64 Sherbet Land DS Desert Hills SNES Mario Circuit 3
DS Yoshi Falls GBA Shy Guy Beach GBA Bowser Castle 3 DS Peach Gardens
SNES Ghost Valley 2 DS Delfino Square N64 DK's Jungle Parkway GCN DK Mountain
N64 Mario Raceway GCN Waluigi Stadium GCN Mario Circuit N64 Bowser's Castle

There's the ones that have been used already. Yoshi Valley is likely, and my guess is they're going to use someone's Rainbow Road this time, and if so i'd put my money on GameCube's. I also like the idea of Wario Coloseum from GameCube, and Cheese Land from the GBA would also be nice...

I'm not sure if they'll include a Rainbow Road. They might have a mindset that each one is special to each iteration, and they may not want to spoil it..... It would be cool if they did, though.... :)

I know it will probably never happen, but i want a cup that only has rainbowroads :D. It could be ds,N64, gamecube and wii's

I just want Yoshi Valley, Dino Dino Jungle, Ribbon Road and Waluigi Pinball. At least two or three of those and I'll be very happy

Block Fort. I must have played almost 100h multiplayer only in that arena. Also, from Kart64 I want to be bob-omb when I lose.

Revenge is just sweet.

Rainbow Road from MK64 please...