It may be more than a year away, but that hasn't stopped Pixar unveiling the teaser trailer for Buzz and Woody's long-awaited comeback in Toy Story 3. Tom Hanks, Tim Allen, Joan Cusack and John Ratzenberger return to the voice cast, joined by newcomers Jodi Benson, Michael Keaton (as Barbie and Ken) and Ned Beatty. Click 'play' below to watch the trailer.