Overnight reports from the US that mega-publisher Activision Blizzard will release new Call of Duty: Modern Warfare, Guitar Hero and Tony Hawk titles next year are "speculative", the company has told VideoGamer.com.

Last night MTV Multiplayer reported that Activision Blizzard confirmed a string of new game titles at a Massive Inc. upfront - an event where publishers showcase their line-up to advertisers.

Games rolled out hoping to secure in-game advertising included Guitar Hero 5 and a new Tony Hawk complete with all-new controller-less gameplay (you won't be holding a standard controller in your hands) with a release set for October 2009 on Xbox 360, PS3, Wii and DS.

Activision also confirmed a new title in the Call of Duty franchise, with Call of Duty: Modern Warfare 2 due for release in the autumn of 09.

MTV also reported that Bizarre Creations (PGR and Geometry Wars) is working on a racing-focussed James Bond game that isn't tied to a movie storyline. This was said to be lined-up for a September 2009 release. The studio was also reported to be working on an original racing title described as Mario Kart meets Forza.

Despite the apparent validity of the news (Newsweek's much respected blogger N'Gai Croal twittered from the event), a representative from Activison Blizzard told VideoGamer.com this afternoon that the reports were "speculative as far as we're concerned".

We'll have more on this story as soon as we get it.