The 2027 season passes for Iowa’s Adventureland have been put on sale. The highest end pass allows access to 11 formerly Palace Entertainment parks, with none of the Herschend Family Entertainment parks on the list (such as Dollywood or Silver Dollar City). Unless additional parks are added later, it looks like we have another year to wait and see how HFE will be integrating the Palace Entertainment parks with their own properties.
Details here:
https://www.adventurelandpark.com/buy-tickets/season-passes/passholder-perks