So, the Rock Band 3 setlist is confirmed: http://rockbandaide.com/rb3-setlist/
Here are the extremely awesome songs, in my opinion (alphabetical by band)
B-52′s – Rock Lobster
The Beach Boys – Good Vibrations (Live)
Chicago – 25 or 6 to 4
David Bowie – Space Oddity
Dire Straits – Walk of Life
The Doors – Break On Through
Flaming Lips – Yoshimi Battles the Pink Robots Pt. 1
Huey Lewis and the News – The Power of Love
J. Geils Band – Centerfold
James Brown – I Got You (I Feel Good)
Jimi Hendrix – Crosstown Traffic
Lynyrd Skynyrd – Free Bird
The Police – Don’t Stand So Close To Me
Queen – Bohemian Rhapsody
Smash Mouth – Walkin’ on the Sun
Tears for Fears – Everybody Wants to Rule the World
And here are some more that I think will also be cool or fun:
Big Country – In a Big Country
The Cure – Just Like Heaven
Deep Purple – Smoke on the Water
Devo – Whip It
Doobie Brothers – China Grove
Elton John – Saturday Night’s Alright (For Fighting)
Foreigner – Cold as Ice
Joan Jett – I Love Rock and Roll
John Lennon – Imagine
Night Ranger – Sister Christian
Ozzy Osbourne – Crazy Train
Phish – Llama
Primus – Jerry Was a Race Car Driver
The Ramones – I Wanna Be Sedated
Rilo Kiley* – Portions of Foxes
Roxette – The Look
Steve Miller Band – Fly Like An Eagle
Warren Zevon – Werewolves Of London
War – Low Rider
Whitesnake – Here I Go Again
The Who – I Can See For Miles
*The lead singer of the band Rilo Kiley is Jenny Lewis, who played the girl in the movie The Wizard
There are quite a few more songs on there that I just haven’t heard, but the only one on there that I have heard and don’t really like is Rehab by Amy Winehouse… which I’m sure some people will enjoy, but I don’t.