I know some headliners have already been announced for some of these festivals. But aren't this 2 or 3 day festivals? For instance Hyde Park Calling last year had The Killers, Neil Young and Springsteen as headliners, while Download was headlined by Faith No More/Korn, Slipknot(Marylin Manson and Def Leppard/Whitesnake.

I think as ACDC will headline on the 11th, Bon Jovi could play on the 12th - although as I said, it's not likely since they would play 4 nights in a row.

As to the Hard Rock Calling, Pearl Jam will headline on the 25th, BJ could play on the 26th or 27th, after the now official last O2 gig.

Do you think there's any chance of BJ playing one of this (or other) Festival?
In a way it could be the perfect finalle for the residency.