References to upcoming films

Some of the Easter eggs in animated films that were coming after them. Thus, these were called at the time of release references to upcoming films.

Instances in MGM films
More coming soon!
 * Upside Mystery - Laura Quayle's creation can be seen while Hans Truman and Jason Truder were in Los Vegas Detective School, an allusion to Drilling Pursuit.
 * Drilling Pursuit - A Stella Lee figure can be seen while Woody Allenson was receiving a letter from Captain Rudy Gordon, an allusion to Upside Mystery 2.
 * Upside Mystery 2 - A magical pool can be briefly seen while Hans, Jason and Stella Lee were on tour at Old York, an allusion to Swan Dream Pool.
 * Puma Race - A Saturn planet can be briefly seen as the trophy at Julius's stadium, an allusion to Saturn.
 * Saint College - A Sherlock picture can be briefly seen while Lana was entering math class, an allusion to Sherlock Gnomes.

Instances in Disney films
Coming soon!

Instances in Pixar films
Coming soon!

Instances in 20th Century Studios films

 * Puppet Pals - When Nathan discovers Tinywood for the first time, a citizen is reading a newspaper that has a Kate & Chris comic strip on it.
 * Kate & Chris - In Kate's room, a Crystal plush doll can be briefly seen on an shelf, an allusion to Crystal.
 * Crystal - A painting of Princess Joanna can be seen when Crystal visits the village, an allusion to Puppet Pals 2.
 * Puppet Pals 2 - A Alaina Gleen plush doll briefly appears on a dresser in Princess Joanna's bedroom.
 * Alaina Gleen - TBA.
 * Crystal: Coming of Darkness - TBA.
 * Little Lily - A lizard depicting Toby briefly appears in a dark forest when Lily, Princess Naomi, Oliver, and Chester are exploring in, an allusion to Puppet Pals 3.
 * Puppet Pals 3 - TBA.
 * Alaina Gleen 2 - TBA.
 * Crystal: The Lost Realms - TBA.
 * The Pixelators - Alaina Gleen appears and meets Officer Alice Summers along with the Fox Animation Girls, in honor of Alaina Gleen: Imaginary Vacation.
 * Alaina Gleen: Imaginary Vacation - A magazine Cassie Baxter is reading has a picture of Princess Joanna on it, in honor of Puppet Pals Forever.
 * Puppet Pals Forever - Peppy Penguin appears in the 20th Century Fox Animation logo in the film, an allusion to The Pixelators: Level Two.
 * Crystal: The Rise of Darkness - TBA.
 * The Pixelators: Level Two - One of the signs in Pixel City depict Alaina Gleen, an allusion to Alaina Gleen: World's Most Wanted.
 * Alaina Gleen: World's Most Wanted - A "Cool Spot" poster appears on the backside of a bus where Alaina Gleen and King Duke ride in it, an allusion to Cool Spot: Spot Goes to Hollywood.
 * Cool Spot: Spot Goes to Hollywood - Felix Fox and Benjamin Bird appear on a graffiti, an allusion to Twentieth Toons: Quest for the Toon Temple.
 * Twentieth Toons: Quest for the Toon Temple - TBA.

MGM
Coming soon!

Fox
Coming soon!