Priority Club Insider lists a bunch of new bonuses for stays between July 1 and September 30. You can only register one, and will want to pick the one that best matches your anticipated stay plans.
You can only pick one, and once you register you can’t change your mind.
Register: -Stay 3 nights earn 5,000 Register: -Stay 7 nights earn 10,000 Register: -Stay 15 nights earn 15,000