But that's not really a surprise character in a traditional sense like Mr. Game and Watch, or Wii Fit Trainer. Villager is only a 'surprise' character in the context of online Smash communities like our own, because we had the foreknowledge of reading through Sakurai's interviews/development journals and picking them apart word-for-word. Nobody but the hardcore Smash community could really have been that surprised by Villager's inclusion, so I don't really think that justifies calling him a 'wtf character' like Melee have had.
Of course having said that, the concept of a 'wtf character' is something we as a community invented in the first place. Mr. Game and Watch was a 'wtf character' in some sense but Brawl didn't really have a surprise character (R.O.B. was a logical choice from the beginning, showed up in MK:DS, important to Nintendo's history etc.), and SSB64's closest thing to a surprise character was Ness, who had a big cult following. Mr. Game and Watch and Wii Fit Trainer are the only characters that could really be considered surprises in the sense that nobody expected the inclusion of either - characters like Villager are just characters who have been deemed unlikely by our own community (which, by its very nature, sometimes causes problems - remember when a good portion of the community thought Geno was a shoe-in character for Brawl? Our expectations are often way off).