They don't just release 1 game of each franchise on a console. The GameCube and Wii each had 2 Metroid games and 2 Zelda games. The GameCube had 2 Pikmin games and 2 Star Fox games, the N64 had 2 Zelda games, the Wii had 2 3D Mario games and these are just some examples.
Also, what about Kid Icarus, Luigi's Mansion and a (main series) Kirby game? These are also possibilities.