I can see them getting back to their original plans of touring with Bryan Adams. Though with Bryans dates already set for next year I could see that happening in 2025 at the earliest. Knowing Jon he'd try to get some more "current" acts that he's built some relations with over the years like Daughtry, Train, goo goo dolls etc... and keep it as a 'with special guests' thing. But other than that there's no one else besides the already mentioned DL, Journey that I could see them doing a co-headline tour with....