Just thought of something.
So now I'm guessing there'll be two SMB modes, two Zelda modes, and two Metroid modes. Doesn't sound too bad to me.
At first I was taking this to mean that there would be one theme per mode, and therefore six franchises would be incorporated. Then I thought about it some more and it occurred to me that if they were going to use any of their other major franchises (Pokemon, Donkey Kong, etc.), they would have listed them to generate more hype.Each of the six modes of play features a theme based on a classic Nintendo game, such as Super Mario Bros.®, The Legend of Zelda® or Metroid®.
So now I'm guessing there'll be two SMB modes, two Zelda modes, and two Metroid modes. Doesn't sound too bad to me.