Well not only Groezrock but also the organisation of Jera on Air added some pretty new names to their line-up. Three to be precise.
First off: Millencolin. Do I have to say more? It's been a while since they last played in our neighborhood so we're pretty stoked to see them both on Groezrock and on JOA. Second name, Caliban. This German metalcore band has already released 12 albums and these guys have been playing together since 1992. Pretty hardcore right? And last but not least: POLAR. This is going to be a huge party!
A Day To Remember, All Time Low, Enter Shikari, Lagwagon and a lot more.
More info here