No music pin really has a specific theme. Or overall story being told. And they do not "create a world under glass."
As every song is telling a different story. And every album was released at different times in the bands career.
Think of any great pinball machine. The shots start a mode advancing the story. That all tie into the theme together. Not modes based on different songs by the same artist. That have nothing to do with eachother other than the band.
What is the overall story being played out in ACDC, Aerosmith, Metallica etc.
I have played Iron Maiden recently and honestly have no clue what the difference in any song/ mode was.