Harmonix have something new up their sleeves, and it'll be a little over a month, at PAX East, before we know what it is. The Rock Band developers have become pioneers of sorts with their weekly use of DLC, creating a business model that wouldn't have been possible before this generation of gaming, so finding out what they're up to next will be very interesting.
"Join Harmonix developers," the PAX East schedule reads, "as they discuss and dissect ten years of beatmatch gameplay creation, tracking their long and glorious tradition of designing music rhythm games like Frequency and Amplitude right up to the first public reveal of a brand new title! The panel will include gameplay examples from internal prototypes, honest discussion of our design process successes and failures, insight into how we create and test our games in development, and a synopsis of the design history of a title on public display for the very first time at the Harmonix booth. Q & A to follow."
It's possible that this is the rumoured XBLA/PSN/Facebook game that somebody found on LinkedIn previously, although more than a few Harmonix fans are secretly hoping for Rock Band 4.