I mean seriously, people complain that Mario's last proper 2-d platformer was Super Mario Land 2 of '93. So what does Nintendo do? NSMB. It's actually a pretty cool platformer, a Mario encyclopedia if you will.
Now we've got NSMB, NSMB wii-heey (urgh), Super Mario 3D Land (what is this, SML3? Isn't that one Wario Land? How is it reminiscent of the original Super Mario Land games?), NSMBU and NSMB2. All of them almost identical to one-another. Oh yeah, there's the 3d gimmick, now the lotsa coins and gold gimmick...did they run out of ideas over there at Nintendo? 'Cause they seem to be bashing the Sequel button, and I don't see them pulling off another SMG 2.
Not to mention they keep pulling ideas out of the '80-'90 games - half the screenshots here depict some SMB3 aspect, half some SMW characteristic.