Sorry, I wasn't suggesting he produce their next album, I was just making the point that of Adele, Taylor and him, he is definitely the most important 'fan' of the band and his endorsement will open doors for the band that may previously have been shut. It wouldn't surprise me if Joy and John Paul have producer credits on the sophomore.
PS Having said that, he sounds like he's done a great job of at least the first 90 seconds of Kingdom Come