It's an interesting coincidence that this 1980 episode of The Muppet Show ends with a big rendition of "When You Wish Upon a Star", a song originally from Disney's 1940 film Pinocchio, 40 years earlier. Because of course some 32 years later, in 2012, Disney acquired Lucasfilm, thus bringing Pinocchio and Star Wars into the same parent company. There's even a Disney allusion in the background scenery here, with a magical castle and fireworks.

So the big unanswered question here is: back in 1980, who knew this was going to happen?

While this may(?) be just a coincidence in our history, in a roleplaying game history of your devising of course there are no such things as coincidences, and this is definitely a sign of a vast globe- and time-spanning conspiracy.

As a campaign or adventure seed, just take some wacky coincidence from real history (for example, anything from this Cracked.com list), and tell your players that they've just uncovered evidence that it's not a coincidence, and let them start investigating. How did someone arrange this event? And why?

Transcript

Chewbacca: {singing} When a star is born, they possess a gift or two.
One of them is this: They have the power to make a wish come true.
All: {singing} When you wish upon a star,
Makes no difference who you are,
Anything your heart desires will come to you.
GM: That sounds a bit like Dib Foundway's first song.
R2-D2: The guy in the attic?
Chewbacca: Yes. I listened to that snippet, improved the melody, and improvised a whole song around it.
R2-D2: And now it's being performed by a group of clones and broadcast all across the Galaxy.
C-3PO: So... the song ended up bigger than Ben heard.