just assuming since its been this way for most of the festivals, jack johnson....yeah. pitckfork calls him radiohead's new BFF, which i find amusing...
radiohead is rumored to headline the saturday, which is also the day warped is in chicago. i will be seeing my 3 favorite bands in one day. this is ridiculous.
Radiohead will be playing Sunday, without a doubt.
As for the third headliner, I'm not sure. But, Wilco is all but confirmed, a member of the band actually said they would be playing it, so yeah. But, I can't see them being the third major headliner, I see them headlining the bud light stage either friday or saturday.