Summer 2016 promotion
Just sat in on a phone call a friend made to MR to handle a points dispute. At the end of the call, without prompting, the Marriott rep said:
"While we don't have any details about future promotions at hand, if there were to be a summer promotion, it would kick off on June 1. So make sure to log into your account and check the Promotions area on or around June 1."
Thought that was interesting.