The Dream of a Lifetime

The Dream of a Lifetime is a 2002 Donald Duck comic by Don Rosa. It appeared in the May 2004 issue of the Scrooge McDuck comic book (Uncle Scrooge #329). It is famous for sharing many similarities with the blockbuster Christopher Nolan film, Inception, which was released eight years later in 2010.

Plot
While Scrooge McDuck is having a dream, the Beagle Boys invade his dream, via a device stolen from Gyro Gearloose, in order to steal the combination to his money bin. Since it is extremely difficult for a dreamer to stop themselves from correctly answering questions posed to them in dreams (according to the in-story dream science), Donald Duck must enter his uncle Scrooge's dream to prevent Uncle Scrooge from blabbering the combination to the Beagle Boys.

Similarities with Inception
Several similarities have been noted to Christopher Nolan's film Inception, including the plot similarities of entering dreams to steal secrets and falling to exit dreams.