The only music pin that could top this in my mind would be a Judas Priest or Grateful Dead pin. With that said it will have to incubate for at least a year once it's announced. Too many unknowns. If not Lyman or Dwight coding, pass. Don't need an LE but a prem could be in play if done well.
Song list
Number of the beast
Run to the Hills
Hallowed be thy name
Revelations
Flight of Icarus
Trooper
Powerslave
Aces high
2 mins to midnight
Caught somewhere in time
Wasted years
Can I play with madness
You could argue any of 22 Acacia Ave, Die with you roots on, and or Sun and Steel if more than 12 songs. Running free and Wrathchild are complicated but necessary. Not sure how anyone could argue against the core 12.