I wouldn't necessarily agree with that, but I'd say a lot of their stuff post-OK and Bends has been bigged up a lot because of their previous successes.
Kasabian was 2 years ago, so no chance.
Pulp + Prodigy look a good bet, who knows on the 3rd.
Victorious have never had an american band headline (flaming lips, many years ago is the only exception) and can't see it happening now.
Florence have nothing else planned, but maybe announce alongside victorious.
The who?
Well, the first 3 or 4 songs anyway - long enough to see him boot a football into the crowd and say 'this one's for our boys in afghanistan'.
Then we left and went to see St Germain on Jazzworld (who were great) 🙂