http://www.bemanistyle.com/index.php?news_id=446 has news concerning some unlocks in Supernova 2. Of note being new notecharts being unlockable for some old favorites. I still have to ask how in the holy f*cking hell it would be possible to do a practical 10 ft chart for AM-3P.
Also, usually I'm complaining about the US versions missing songs from the JP arcade versions. Well, this time it seems it may be the other way around as this is a list of songs that appeared in the US tests and NOT and haven't appeared in the JP AC release thus far.
JUPITER: The Bringer of Jollity / PLEIADES PRODUCTION
L'amour et la liberté (Darwin & DJ Silver Remix) / NAOKI in the MERCURE
PARANOiA (HADES) / αTYPE-300
Pluto / Black∞Hole
Pluto Relinquish / 2MB
Poseidon / NAOKI underground
Saturn / Mr. Saturn
Uranus / Tatsh SN 2 Style
Arrabbiata / Reven-G改 (Reven-G alternative)
Bloody Tears (IIDX EDITION) / DJ YOSHITAKA
CaptivAte~誓い~ (CaptivAte~CHIKAI~) / A/I
FIRE / Mutsuhiko Isumi
Votum stellarum -forest #25 DDR RMX- / iconoclasm
MARS WAR 3 / JET GIRL SPIN
STARS★★★ (Re-tuned by HΛL) DDR Edition / TЁЯRA
Venus / Tatsh+RayZY
http://zenius-i-vanisher.com/v2/ddrgamedb.php?gameid=32 has the songlist.