Not what I've heard.
Metallica and Machine Head have both confirmed they'll be in Glasgow on June 2nd, and there's rumours that there'll be something on June 3rd as well. Sadly enough, the rumours for the other bands are Linkin Park, Korn, Slipknot and (not so bad) Audioslave.
Whatever's happening, there's supposedly going to be an official announcement next week.