Flake was recently interviewed by Japanese media outlet "AVE | Corner Printing". The interview is mostly about his latest book, but Flake did slip in a word about the 2023 tour, explaining that the stage will be the same as 2022, but that the band will change the setlist:
I'm going on tour starting in May of next year. It will be the same stage as this year, but we will add new songs. We're supposed to discuss it [with the band] next week (the interview is from Dec. 12).