According to Dhani Harrison, son of The Beatles band member George Harrison, the upcoming Beatles-themed Rock Band game will feature never-before released material from the legendary band. Harrison revealed this in a recent Billboard interview.

"I took the project to Apple and sort of convinced everybody to have a presentation," he said. "We’ve been working on it for the past two years. This is the first one that is going to be totally, historically accurate. It’s been a real headache, but it’s been the most enjoyable work I’ve done in my life."

The Beatles: Rock Band is set for release on September 9 on PS3, Xbox 360 and Wii.