Malstrom: "I blame Mario Galaxy for the Wii´s problems in Japan".

[theRepublic]

nintendo_fanboy said:
True. I'm too lazy to look it up again now, but he says something like "why is Nintendo releasing a second Mario game before they release a Zelda Wii, a Starfox Wii, a Donkey Kong Wii or Pikmin 3?".

I come to think that actually, he just doesn't like 3D gaming.

Found it, and it seems to make more sense in context:

When NSMB Wii was introduced, it was said it has been so long since a 2d Mario because Miyamoto wanted to do more than add in new items or levels, he wanted a new gameplay experience. In that same conference, the ‘sequel’ to Super Mario Galaxy is shown that is a similar gameplay experience with nothing more than new levels and power-ups (like Yoshi). Apparently, it takes two decades worth of time in order for a new 2d Mario to be made, yet a sequel to a 3d Mario is already in the making before Zelda Wii (Twilight Princess was more of a Gamecube game), before a Starfox Wii, before a Donkey Kong Wii, before a Pikmin 3, before a Kirby Wii, and so on. This is why I side on the theory that someone at Nintendo (maybe Miyamoto) absolutely loves 3d Mario and keeps cranking them out. If they wanted to bring out a core game, there are many other franchises to choose from. Core Nintendo gamers would have been satisfied seeing Pikmin 3 or Starfox Wii. Instead, we get yet more 3d Mario.

3d Mario is an excellent core game. It is not that I dislike 3d Mario, it is that I dislike all of Nintendo’s core games being 3d Mario. A sequel to a 3d Mario, on the same console, is fine. But a sequel to a 3d Mario, at the expense of Pikmin 3, of Starfox Wii, and other series fans are waiting for, is not fine.