I don't know, after their recent less than superb albums, Weezer might not be a headliner. Dylan isn't known to be a great live act, but he is a legend nonetheless. And i think Beck is less popular than the already announced headliners. at least right now he is
i would say at the present time, the Foos, STP, JJ and Kanye are bigger than Beck and Weezer. And Dylan might not be the best fit for vfest, meaning he isnt a headliner. That being said, the thought of Bob fucking Dylan "opening" for anyone else is blatant sacrilige.
if Beck, Dylan, and Weezer all play, ill most likely be there