It’s a grim old world out there lately: Disappearing crabs, nuclear armageddon trending on Twitter, spellcheck getting lippy with us about whether we capitalize armageddon…It’s rough times all around.

Back when he was building Disneyland — and transforming American entertainment in the process — Walt Disney famously espoused the idea of “plussing” things. When his Imagineers came to him with a good ...