There's a TON of great stuff coming off copyright protection next year:
Felix the Cat <--- potential to be a cool pin!
Early Our Gang shorts
Some Buster Keaton, Charlie Chaplin, and Harold Lloyd movies
Shorts by Laurel and Hardy
Bambi (the source book for Disney's movie)
Some Agatha Christie books
H.P. Lovecraft short stories like The Lurking Fear
Cecil B Demille's The Ten Commandments
Mickey Mouse of the Steamboat Willie era comes off protection in 2024. That will be BIG. Disney's going to have a coronary, unless they pay off congress to revise the copyright law for them AGAIN.