The double release of Guitar Hero 5 and Band Hero in 2009 were the last of the series' games to be released on PlayStation 2.[86] It was expected that the 2010 entry for Guitar Hero, Warriors of Rock, would be the final entry developed by Neversoft, based on claims that Neversoft would be letting go of its Guitar Hero division, with Vicarious Visions likely poised to take over future development.[2] Further industry rumors pointed at the closure of RedOctane Studios and Underground Development (the development studio for Guitar Hero: Van Halen) as further results from the scaling-back; Activision moved the controller hardware development within their own division to continue to support the series,[87] with RedOctane founders Kai and Charles Huang remaining with Activision.[88] A week prior to these announcements, the Guitar Hero division CEO at Activision, Dan Rosensweig, left the company, leading to some speculation on whether Rosensweig's departure influenced these changes.[89] Activision and RedOctane had trademarked the titles "Guitar Villain", "Drum Villain", "Keyboard Hero" and "Sing Hero".[90][91] RedOctane originally trademarked the titles "Drum Hero" and "Band Hero", but the work performed towards the Drum Hero title was eventually folded into the gameplay for Guitar Hero World Tour, and Band Hero became its own game.[8] Later, as of October 2009, Activision reapplied for a Drum Hero trademark.[92] Pi Studios, which had previously helped to port Rock Band to the Wii, had started work on the karaoke title Sing Hero before Activision cancelled its development.[93] Dance Hero would be in development before being cancelled.[94] Several ideas for the game later made it into Shake It Up.