Yeah, that whole Wizard of Oz / Darkside of the Moon Thing

Supposedly, Darkside of the Moon was recorded specifically to line up with different events in the (original) Wizard of Oz movie, the phenomena was dubbed the Darkside of the Rainbow. I’ve even seen a live show to this effect.  Someone queued up the movie with the album on youtube so you can check it out yourself.   Pure coincidence or something more?