It looks like Xbox.com has added the Rock Band 4 files in advance of a digital pre-order, and included in that are some brand new songs that one can assume are likely the digital pre-order bonuses for the Xbox One. Also shown are the 30 free songs for every pre-order, and interestingly enough, the Amazon pre-order tracks. Interestingly enough, Xbox One users are getting 12 songs, as opposed to the 10 that PS Plus users are receiving. Could it be to make up for needing to purchase the instrument adapter?

All That Remains – What If I Was Nothing

BABYMETAL – Gimme Chocolate!!

Earth, Wind & Fire – September

Interpol – All the Rage Back Home

Jefferson Starship – Jane

Linkin Park – Rebellion (ft. Daron Malakian)

Marilyn Manson – The Mephistopheles of Los Angeles

Mastodon – High Road

My Morning Jacket – One Big Holiday

Pierce the Veil ft. Kellin Quinn – King for a Day

“Weird Al” Yankovic – My Own Eyes

The Wild Feathers – Backwoods Company

[Xbox.com: Rock Band 4]