Watch this trailer for The Smurfs 2 and then we'll talk about it.
Yeah, I quite enjoyed that Trailer Voice Man gag. It merits at least a positive sort of groan.
So those evil, grey smurf-ish things are called Naughties. At least they were actually created to be naughty - it's not as stupidly convenient as Decepticons, Cruella De Vil or Sinestro for example.