two important aspects to that prediction that need to be taken into consideration. One is that it says "a new wii take..." which seems to imply this is not a franchise that has been on the wii before, thus excluding Zelda, Mario, or Metroid. Also we have to wonder what exactly they mean when they say "classic". Are they talking about the popularity of the franchise in question, or are they simply refering to it's age. If so, how far back do they go to consider it a classic? N64 days, or all the way back to NES?
Right now there are too many possibilities to make any strong guess. But there aren't too many other "major" franchises in Nintendo's reserve that I haven't yet excluded.
My personal guess would be, if there is an announcement about a major franchise sequel, it would either be something to do with Donkey Kong or Animal Crossing.