Batman: The Movie (Amiga) Game rip (http://www.fileserve.com/file/bqksNAd)
Not sure if the amiga rip is complete, don’t have the arcade one. I put the C64 rip there because i think it’s far better than the amiga version and because it was a favourite game of mine on the C64. Jonathan Dunn might be the other person you are thinking of.
Edit: Yes, Jonathan Dunn might be the guy I forgot about. If I guess correctly, I’d say Cannon gave the most output in the game: I mean, most of the tunes that recur in all four versions (Atari ST, ZX Spectrum, C64, Amiga) bear his name. The only difference I’m currently aware of is that the Amiga ver. features musics for the Batmobile/Batjet stages entirely different from the ones used in the C64: maybe that was Mr. Dunn’s contribution.