Activision’s DJ Hero, a widely-rumored music game supported by a turntable peripheral, is set to release this year, says CEO Bobby Kotick. Speaking at the Davos World Economic Forum in Switzerland, Kotick responded to CNBC reporters’ questions about innovation in the games business by touting the upcoming product. “We have this product called DJ Hero coming out later this year, which is a turntable that you can actually play competitively, spin discs and mix on,” …