Lotso (Toy Story 3)
Shortly after Carl's house takes off viewers can briefly see Lotso from Toy Story 3.
As Carl’s house floats through the city we see many citizens gazing in awe at the amazing sight. Among those people are a little girl in her room playing with an airplane.
If you look to the left of the screen beside the little girls bed you’ll see Lotso, the antagonist from Toy Story 3 propped up against the wall. This is really cool considering Up came out in 2009 and Toy Story 3 wasn’t released until 2010, which makes this a prediction egg… The coolest kind of easter egg.