So, quite a few people have been speculating about how the music will work in upcoming builds. In the Beta Smash Con stream, the devs specifically stated that there won't be a "my music" type feature for Beta, although they might implement it into the 1.0 release. What if, along with a My Music feature, you'll be able to import music to play on certain stages? From the devs' hinting at downloadable content being implemented into the final release, it wouldn't be too surprising if they added a way for you to put in your own music without the use of mods. What do you guys think?

Hopefully, that'll happen. I'd like to play on Green Hill to "Open Your Heart". And maybe on Dream Land to "One Last Shot" from Kirby Planet Robobot

It's a rather highly requested feature, so I'm hoping it's gonna be a downloadable version exclusive when the full game comes out.
If there isn't one in the end then I'll be a bit sad honestly.

As much as I'd love it, I can't help but wonder how things like proper looping would be done with something like that. I doubt we'd be able to import .brstm files.

^Maybe via some GUI tool? I've heard stuff like that can work sometimes, though I myself have no experience whatsoever.