Older sets in The Lego Movie?
The Toa Mata from BIONICLE briefly appear in the film when Wyldstyle
  is talking to Emmet about the prophecy. So do Fabuland, 9448 Samurai
  Mech from Ninjago, 3189 Heartlake Stables from Friends, 8158 Speed
  Racer &amp; Snake Oiler from Speed Racer, along with a few other themes.
  Some stopmotion videos created by fans on ReBrick were featured in the
  movie.


Brickipedia: The LEGO Movie

The car Emmet drives at the beginning of the movie is a slightly modified version of the 3177 Small Car.