There are three new hotels in the Autograph Collection:

The Saint Hotel in New Orleans,
http://www.marriott.com/hotels/travel/msyak-the-saint-hotel-autograph-collection/

The Blue Moon Hotel in Miami Beach
http://www.marriott.com/hotels/travel/miabm-blue-moon-hotel-autograph-collection/

The Winter Haven, also in Miami Beach
http://www.marriott.com/hotels/travel/miaak-winter-haven-autograph-collection/

Marriott also announced a September opening for a previously unmentioned hotel in Dubai, the Marriott Dubai Health Care City.
http://www.marriott.com/hotels/travel/dxbmh-dubai-marriott-hotel-health-care-city/