DLC can be found here: http://www.rockband.com/forums/showt...25#post4424125
Play an instrument and sing:
Think your enough of a superstar to sing and play an instrument at the same time? Mimic the likes of thousands of legends before you and play guitar, bass, keys and even drums while you belt out the lyrics to your favourite son. Not only will you get more points, you’ll get more fans too! Charts can be adjusted for ease of sight between the two. Also with harmonies only mode, you can be a backup vocalist exclusively, so that you don’t have to worry about singing all the time.
In depth story mode:
Gone are the days of boring, story-less Rock Band Story Modes. Explore the world with your band and rise to stardom with a little help from your friends and music legends. Make your own choices on where to go next as you journey towards the Rock and Roll Hall of Fame and your own place in Rock history! Play legendary venues like Madison Square Gardens and the O2 Arena as you record albums and go on tours to promote them.
Deluxe Edition w/ Free bonus tracks:
Like any good music release, Rock Band 4 (Deluxe Edition) will ship with a slew of extra content including a backstage pass into the offices of Harmonix and the making of the game. The deluxe edition also comes with 10 extra bonus tracks: of your choice! Choose any 10 of the songs on the Rock Band Store and we’ll pick up the tab! The package also comes with a limited edition poster, guitar picks and drum sticks.
In game star appearances:
The Biggest stars in music show up to help you out and to get on stage to rock on with you! The likes of Phil Collins, Bethany Costentino, Mick Jagger and more will rock along with you to their hits as well as help you on your way to your way to stardom.
Rock Band 3 introduced Pro Mode. Now Rock Band 4 is taking another leap in the rhythm game industry by adding studio mode. You can now record, edit, release, and chart your own songs via Rock Band Network. Give your songs your own unique touch by using in game effects for your instruments. Add distortion to give your songs a rough edge, add rotary onto your keyboard to get a vintage organ sound, the possibilities are endless. Using Pro Instruments to record the music, you can make your own music and start your own rise to stardom!
New to Rock Band 4, you can now download entirely new tours to add to your game with new venues and songs. These packs will cost as little as $5 for a small tour with no new songs, or $15 for a huge tour with new songs, and new venues.