Super Mario Galaxy 2 <----- is already out... I play it all the time. perhaps you could find it if you went onto the Nintendo website.
unknown
Mario Kart nine is the swimmingbird next Mario game.
So far, there hasn't been any news on the next "official" Mario game. However, the next Mario game coming out will be Super Mario Sluggers, for Wii. SUPER MARIO GALAXY 2
I think Mario super6
mario party 9
probably
Mario sports mix
The next Mario game will come out Late december of 2013 and will be Mario and Sonic: Winter Olympics 2013
Mariokart 3DS
I Think it is Super Mario 3D Land for 3DS
Mario kart 7 is the newest one ou now in febuary 2012
Gooper last appeared in Mario & Sonic 2012 Olympic Game.
Of course their always will be Mario won't ever go old probably the next Mario game might be something like bowsers inside story or something like that