i think a really creepy long music video to MAYH or still life or even ghost reveries would be cool, kind of like broken by NIN or the wall by pink floyd.. not like a movie with dialogue, just a long creepy concept video would be predictable
I would rather see some sort of Opeth adventure, where they solve mysteries or fight aliens.
"And I would have gotten away with it too, if it weren't for you mettling metalheads!"