Well thats not true. The War on Drugs played between Pixies and PJ.
QOTSA was supposed to be the sub/co-headline of Metallica, then they cancelled so it would be GvF and in the end it was Turnstile.
In 2016 Goose subbed RHCP with Editors closing after them.
" Fred again.. is the sound of today and tomorrow. It will be a big party at The Barn."
And because he's a big name nowadays it seems logical he will close the Barn.