I honestly wouldn't be surprised if Frigate Orpheon's music selection is just Brinstar and all three Other M rips.
It will almost certainly be the same songs as it originally had, plus Pyscho Bits and maybe Brinstar Depths. Maybe Lava Fish too, as it kind of fits.
Which tbh wouldn't be a bad song list at all. Yea, we'd loose one great song, but a few Brawl stages lost some good music anyway, and Brinstar Depths is a nice song.
I believe, other than Ballad of the Goddess, the song list on Pirate Ship is exactly the same as it would have been if it was a stock stage. It basically has a bunch of songs that didn't fit Temple, but Temple has anyway, and some remixes that it would have had on it. The Zelda medley from Hyrule Castle fits so much better on this stage.
Not sure why Full Speed Ahead isn't on the stage, though.
The question that should be on everyone's mind though, is if Distant Planet gets ported to the Wii U, will it have Big Brain Academy as music.