Dan Hess remade the Birdman music with higher quality instrumentation. It sounds great
https://youtu.be/wkMELrsojbg

Jon mentioning how in the past people moved on from consoles once the next one came out reminds me of when I bought an NES as a kid in late 1993.  I had gotten the itch to play the original Zelda so when Funcoland had something like a used NES and a game for $20 I had to get one.  I walked in and asked the 20-something clerk for a Nintendo and Zelda.  I remember him pausing and giving me a funny look.  He asked me if I meant a Super Nintendo and A Link to the Past.  I said no, an original Nintendo and the first Zelda please.  He continued giving me a perplexed look and again asked me if I was sure.  I said yes.  He said alright in an “it’s your funeral pal” tone and went and got them for me.  My friends were also surprised I “wasted” $20 on an old game like that.

On the topic of Nintendo releasing retro games, the smart and handsome question asker left open the possibility of Nintendo finishing off an unreleased game. And they've done this, at least one and more depending if you count localising.
So my firth thought was Star Fox 2 which was finished off and released for the Super Nintendo Mini Classic.
The other option is the often forgotten localisation of Fire Emblem™ Shadow Dragon & the Blade of Light, which was available as a standalone purchase on the Switch eshop for a limited time. They even did a physical version with a commemorative NES cart.