This is beyond tentative, and a mere rumour based on a tip from a website, but Virtual Festival believes that Sonisphere – which returns to Knebworth next year – will be headlined by Iron Maiden and Guns N’ Roses.
In 2010 the festival will be in the UK on July 31 and August 1. Metallica headlined the second night of this year’s UK festival.
It’ll be interesting to see how this pans out.

[...] it: Maiden to confirm they’re headlining Sonisphere next year. (Blabbermouth) This was tipped back in October by Virtual [...]