Marriott Bonvoy’s last global promotion called Unlock More was valid for stays between October 29 – January 5, 2020 (read more here).
It is unusual for Marriott not to have a global offer for two months (there are some targeted and property/area-specific), but now there has been some chatter of new promotion to be unveiled next week.
You can access Marriott Bonvoy promotions here.
The new offer is apparently called Elevated Earnings and members earn 2,000 bonus points for each eligible stay consumed during the promotional period starting from the second one between March 17 – June 14, 2020. The registration for this new offer should open on Tuesday (March 3).
Note that we have not been able to independently verify if this is the new global promotion or not, but sounds more plausible than not.
There could always be targeted offers or various milestone bonuses added to some if not or all members. I assume that we should learn more about this offer early next week.