I think the entire teaser consists of footage of the aforementioned 95% completed movie that was shelved. I just watched it and I don't recall seeing any of it in the final movie, but I could be wrong.
The impression the teaser gives is something I want to see too. I watched the audio commentary & the directors joke that maybe in "50 years Pixar will release it."
Attached pic is the only scene they confirm is from the almost completed movie, it appears in trailer #1.