Bright has stated that, while too late for the planned release of "Guitar Hero 5", they are looking towards future instrument controller interoperability, including use of the "DJ Hero" controller into gameplay for future "Guitar Hero" titles, or using drum controllers within "DJ Hero". "DJ Hero 2" was officially announced in June 2010 and was released in October 2010, featuring more than 70 mashups from over 85 artists. The game includes several new gameplay modes, including a "Empire" career mode, head-to-head DJ battles, social multiplayer modes, and a jump-in and out Party Play mode similar to "Guitar Hero 5". The game includes more vocal options for singing and rapping to songs, and a freestyle mode for players. Artists include Eminem, Daft Punk, Chamillionaire, Dr. Dre, Chemical Brothers, Kanye West, Metallica, Lady Gaga, and Rihanna, while Deadmau5, DJ Qbert, David Guetta and Tiësto are playable avatars in the game. Prior to the game's announcement, Activision revealed a month before the game's release that it is actively seeking artists for downloadable content and a sequel to the game. One DJ in speculation to appear is DJ BJ, including mixer DJ Qbert. David Guetta has stated that he is set to work on the game's sequel to arrive late in 2010. Activision CEO Bobby Kotick stated that despite low sales of "DJ Hero", they are committed to continuing the series, with the sequel due in 2010. The sequel, "DJ Hero 2", was further confirmed during an Activision investors report for 2009, citing it as one of only 2 major "Guitar Hero" titles to be expected from Activision in 2010, with an expected late-2010 release date. At Nintendo's E3 press conference on June 15, 2010, the Nintendo 3DS handheld console was revealed. At the conference Nintendo listed a number of publishers and franchises coming to the 3DS, one of whom was Activision with "DJ Hero 3D", a new installment in the "DJ Hero" series and the first handheld "DJ Hero" title. The gameplay is similar in nature to "DJ Hero", where the stylus and touchscreen are used to mimic scratching and crossfading between songs. It was later cancelled due to poor sales of "DJ Hero 2". On April 15, 2009, the publishers of "", Genius Products and Numark, sued against "Scratch"'s developer, 7 Studios and Activision.