Okay, I know I've been coming back to this a lot, but just wanted to let everyone know that I definitely worked out another song from the game.

Track 8 in the link at the top is a cover of 'Ne!' This song was originally used as the Woman Team theme in KoF '94, but returned in '98:
https://www.youtube.com/watch?v=JeookeicQ1s

And another interesting thing I noticed: KOF '96 was rereleased in Japan for PS1 on July 23, 1998 - the exact same day that '98 came out and around the exact same time Hummer's port was released. Plus, judging by the "character stance" versus screen in Hummer's version, which only appears in the 32 bit versions, it seems extremely likely that they used this occasion - and version! - to port the game!

Reviving this thread for a very interesting discovery that I apparently made years ago and forgot about until someone recently replied to it on Youtube:

You remember that unbelievably goofy track that plays when you fight Shao Khan in The Pit? The one that sounds nothing like something you'd hear in a MK game?
https://www.youtube.com/watch?v=EoCdwd9EOeI

Turns out it is a version of Andy Asteroids for a very early build of Earthworm Jim 3!
https://www.youtube.com/watch?v=KjEUTLbjZFI

I almost didn't recognize it myself since it's extremely garbled (try recreating a bluegrass song in 8 bit) but if you listen to the triangle channel you'll quickly recognize it. It doesn't appear in the rom of EWJ3 so it must have been scrapped early in development. Why this track does not appear in EWJ3's rom as opposed to the Psycrow theme can be attributed to the fact that Hummer likely realized they couldn't recreate a 3D/Mode 7 stage on the Famicom, but still wanted to keep the Psycrow battle in (and as we all know, ultimately they didn't)

I did a song check for the other seemingly original songs for MK3 to see if they matched up with any EWJ tracks, but no luck.

Just wanted to let everyone know that I am still working on identifying the songs. 

Goenitz' theme is, as far as I'm concerned, a cover of Croce's "It Doesn't Have To Be That Way." It could also be "Alabama Rain," but when playing them side by side, It Doesn't Have To Be That Way sounds more similar.

From 27:28 here: https://www.youtube.com/watch?v=rw21RjyvbvA
Compare: https://www.youtube.com/watch?v=Sxvd8NEd_C8

If you play it at 0.75 speed (or Croce's song at 1.75x) it sounds very similar.

Thinking of taking this to r/tipofmytongue. It's really too interesting of a case to be left alone.

Okay, today I learned how to read the PCB dates on (Super) Famicom PCBs.

However, I'm confused by a date like EL860339C (Donkey Kong Country 4 and Tiny Toons Adventures 6 reprints from March 1999)

86 indicates it was manufactured in 1997
03 should be March
But what's with the 39? I thought maybe the 'C' could stand for calendar week, but the 39th week of 1997 was in September. Or is it 3 for March and 9 for 99? But then why would they stamp it with a 1997 date? Is it a revisional/reprint date? Or is the code meant to be read like this:

released-1997-march-revised-march-99

Okay, this seems really weird, but I noticed how My Heart Will Go On was in Hummer's Mortal Kombat 3. Nothing special, right? Until you take into account that it was reviewed as early as March 1997 in the Great Dragon, while Celine wouldn't even record the song until two months later.

Question is, how did they know about this song when it wasn't even recorded yet? Fair enough, Titanic was a huge project that was probably being reported about in 96/early 97, but I just can't understand how they put the song in there. I thought it was perhaps added in the MK4 hack (which was probably released at the same time the real MK4 and Titanic came out) but MK3 also uses it.

Fascinating. The fact some songs are based on KOF'98 which was released in mid 1998 makes the Hummer port way more recent than one would think. Final Fight 3 was seemingly manufactured around September 1998. KoF'96 containing the unused string LET'S HIT THE STREETS in its code suggests it was build atop (partly) Final Fight 3, or at least a work in progress version. It's also the closing title of the NT-6xxx line which contains more than a hundread of different entries. All from 1997 and 1998. Thus it was likely released at the very end of 1998.

It should be released before Final Fight 3, as FF3 was their last game released by JY. Due to the release of ‘98 it was released sometime late July or (more likely) August 1998. Maybe you used an early reprint for reference?

I don't know how to explain this, but I have some sort of synasthaesia for music and time, and it's definitely telling me this was released in the summer of 1998.

So to sum it up in one post:

Boss Team stage - These Dreams by Jim Croce
Fatal Fury Team stage - New York's Not My Home by Jim Croce
Japan Team stage - Unknown
Iori Team stage - KOF '98 Art of Fighting team theme
(which itself is Todoh's theme from AoF 2, but it's obvious where they got it from)
Goenitz stage - Still unknown, but now that I think of it it sounds very strongly like the bridge from Fairy, which was Chizuru's theme in 96. Compare from 1:20: https://m.youtube.com/watch?v=lseEsjtm1Ms

Unused tracks:

Esaka (possibly the 98 version?)
KoF ‘98 - In Spite of One’s Age
Unknown, possibly Rhythmic Hallucination.
Street Fighter Zero 2 ending theme (left over from SFZ297)