The album notes for Spider-Man (by Ahmad Basheer) say "This alburm is the first in a series matching Marvel with music, so be sure to collect them all. If you don't, WHAM! SOK! KLONG!"
The CD re-release from Feb 1999 is a Japanese import. It claims to be #2 in a series named "Diggin' from Prestige", consisting of 10 albums presumably of equally funky 60's jazz. If I could read Japanese, I could tell you what the other albums are. I'll try and do some research to find out if any of the other Marvel albums were ever created.