Villager was a crazy guess, too. Sakurai had directly stated in the Brawl Iwata Asks that an Animal Crossing character would not work, and even if they went and guessed that Sakurai would go back on this statement, they would need to guess
A) That he would choose the generic protagonist over someone like Tom Nook
and, perhaps more telling.
B) That he would be called "Villager" at all, a name that the character had never used before Smash. Most prediction rosters I was aware of called the character "Animal Crosser", after all.
That leak was always confirmed in my eyes. Although it's not like Pac-Man, Mac, or Mii weren't effectively shoo-ins anyway...