Yuji Takenouchi's been teasing a Mystic Warriors re-recording/remaster project for a while.
He
visited City Connection last month to make a new recording from the arcade board, and
posted a progress report just a little while ago that most of the arrangements are done, but there's still pending approval from Konami on any future release.
He says
in a reply that the OST side will include tracks that weren't on this original release. He also attached an image of a table with a full composer breakdown, so say hi to 外注井上 Mr. Outsourcer Inoue again (Tr. 20, 32). See also
Go Sato listed as bass player on two of the arrangements in the far right column.
(Backup of table image)
Except for the first stage, the track times match the arrangements from
TECHNOuchi Encyclopedia 1989-1996. So if you're lucky enough to have that in your library, you've already got a preview of what's to come.