Activision plans to cut down on the number of Hero games in 2010. According to Activision Publishing CEO Mike Griffith in a conference call, the company expects the music game business to decline further as "the casual consumer proves less robust" and people are saturated enough with instrument controllers that they start buying only new discs.

"Fewer SKUs will service a broader audience," Griffith said. "In 2009 we released 25 music SKUs, and in 2010 we plan to release less than 10." The cuts will come in the form of PS2 versions and Band Hero bundles (leaving only standalone discs for that game), as the company focuses on Guitar Hero and DJ Hero releases in the "back half of the year."

That 25 SKU number, by the way, is a pretty conservative estimate. We added up just each console version of Guitar Hero Metallica, Guitar Hero Smash Hits, Guitar Hero 5, Guitar Hero Van Halen, Guitar Hero On Tour Modern Hits, DJ Hero, and Band Hero -- not counting various instrument bundles or special editions, and not counting cell phone versions -- and came up with 26. If you were to add things like the Renegade Edition of DJ Hero and add standalone disc releases to instrument bundles, that number would go up significantly.