Marriott Rewards has been sending out emails today to select members teasing about the fall 2017 MegaBonus!
Seems that there is an option for a free night cert after two stays with additional bonuses to lock. The registration is set to open on September 7.
You can access your Marriott Rewards promotional center here.
A LoyaltyLobby reader forwarded me the email that he had received from Marriott Rewards and I have requested clarification. Will post an update once I have received further information.