The demos will be held at booths A21/B30- A31/B30 in Hall 6, which hosts the "massive Call of Duty Multiplayer arena". They also tease of the "exclusive reveal" due the same day, streaming live.
The reveal for Black Ops 2 next week will be hosted by Xbox LIVE's Major Nelson and AceyBongos, and it features "live gameplay from the show floor" with dev interviews.
"Starting day one of Gamescom on 15th August, attendees can go to the Call of Duty®: Black Ops II booth located in Hall 6, booth A21/B30- A31/B30 to compete in the massive Call of Duty Multiplayer arena and go hands-on with award-winning developer Treyarch’s new title," announced the Activision press release.
"Turtle Beach is also part of the Call of Duty® arena experience at Gamescom 2012. In partnership with Activision Publishing, Inc. and Treyarch, Turtle Beach will be offering attendees a chance to win a tournament round at its booth (Hall 6.1, booth C10) and earn a V.I.P. Express Pass to Activision’s Call of Duty: Black Ops II multiplayer arena."
Call of Duty: Black Ops 2 releases on Xbox 360, PS3 and PC November 13th.