Many readers have written in to let us know Metallica may be the star of the next major installment to the Guitar Hero franchise. "Edward Woo, a Wedbush Morgan Securities analyst, was going through some SEC filings from Activision, and found the following plan. 'In fiscal 2009, we plan to publish Guitar Hero: On Tour for the NDS; Guitar Hero: Aerosmith, Guitar Hero: Metallica, and Guitar Hero IV across multiple platforms,' the report read. Since the fiscal year ends March 31, 2009, it doesn't sound like we have long to wait for this title. That's four Guitar Hero games coming in the next year. How many can the market take?"