I would assume they'll make another one so I was listening to some music and just thought to myself for a couple of them that that song would be tough/fun for that game.
Just list up some songs you think would good for the next addition.
Fred Bear - Ted Nugent
Dire Straits - Sultans of Swing (it's got that bit*hin' part towards the end that would be near impossible)
Metallica - One (just for the LONG end part)
Scorpions - Robot Man
Alien Ant Farm - Smooth Criminal
Sublime - Santeria
Disturbed - I'm Alive (most anything by Disturbed would be tough)
The Doors - House of the Rising Sun (for classical purposes)
System of a Down - Shimmy
Anything by Santana (for impossibility purposes)