Here is a lovely pin set released in 2005 to coincide with Disneyland's
50th Anniversary celebration. It features the poster art of three
classic Tomorrowland attractions: the Skyway, Submarine Voyage, and
Autopia, with pins for the blue Skyway cabin, mermaid, and blue car in
each respective poster.
As you can see, the top says "Disneyland" and the bottom says "Tomorrowland" - this bottom qualifier implies that this could have been part of a potential series, for all the lands. (Otherwise, why include the "Tomrorowland" distinction?) This was the only one released as far as I know, but as an optimistic Disney dreamer I always love to think "what if...?"
