I saw a few weeks ago that he announced arenas and was surprised by that as well. I think North stage is usually the 2nd name of the day so I assume there'll be some (probably slightly) bigger name than him - like... Scorpions or Sabaton 😐
I'm certainly no LP expert, saw them a few times at festivals but never owned any albums. Wife is a big fan of them and that scene.
When a band had so much focus on the lead singer, I'm surprised they just can come back as headliners.
Different circumstances, but Kasabian had to work back up to bigger venues/festivals. That being said Queen did large venues and stuff when they returned with Lambert.