When i saw them on the 23rd of December (last date of tour) Bruce said "We'll be seeing you next year, so bring your wellies (wellington boots).... Good old Donnington!"
It's deffinetely Donington!!!!
But cant remember if bruce said a Festival!
It is more than likely that thet'll be playing at download, last time they played at donington was in 2003.
They will definiately be headlining the saturday or sunday mainstage,
Other rumours iclude AC/DC and also Trivium :S (Source - Download festival forum from last year)
You can't Kill Rock n Roll