Dug the Dog is “Previewed” by Remy from a High Altitude.
In the case of Disney, it’s not just about the past; it’s also likely that some of their most recent films will have signs about what’s to come in the future. Ratatouille, for example, provided a fantastic example of this. After years of watching these brilliant Disney movies the audience finally figure out the pattern of how the Disney productions leave a hint of their future projects
Dug from Up, who had not yet been published, appears in a shadow during a scenario in which Remy the Rat is snooping around and frighten off the main protagonist. Nobody would have guess that a few years back as it was not obvious but now we all over aware about this pattern of the Disney to reveal their future characters like this