The large number of Guitar Hero and Rock Band titles on the market is considered to be partially responsible for the sharp decline of music game sales in the latter half of 2009, along with the effects of the late-2000s recession.[1][2][3][223] The market for rhythm games was $1.4 billion in 2008, but dropped to $700 million (a 50% decrease) in 2009 even though more titles were available that year.[224] Former Neversoft project director Brian Bright noted that at one point in 2009, they were responsible for the release of three games that year (Guitar Hero 5, Metallica, and Band Hero) and supporting other studios for the development of two additional games, causing the studio to lose focus both in development and marketing efforts.[225] According to Bright, sales of all the Guitar Hero games released in 2009 totaled the number of sales of the 2008 title World Tour, demonstrating the dilution of the marketing.[225] Though Activision had originally planned on tripling the offerings of the Guitar Hero series in 2010,[226][227][228] the company readjusted their plans, reducing the number of offerings and focusing more on selling digital downloadable content for the series.[229] Only two titles, Guitar Hero: Warriors of Rock and DJ Hero 2 were released in 2010,[11] both scheduled for the "back half of 2010".[230] Analysts believe that the market will evolve to support a smaller number of titles each year, averaging at a "healthy" value $500–600 million in revenues annually.[224] Kotick believed that part of the downfall of Guitar Hero was due to Activision's introduction of DJ Hero, which they gave too much focus and left the core Guitar Hero games without the "nourishment and care" needed to continue to innovate in the series.[13]