As we have rumored on this site for some time, the Guardians of the Galaxy Ride coming to Epcot will indeed be a roller coaster attraction.

AT D23 EXPO 2017, DISNEY PARKS CHAIRMAN BOB CHAPEK ANNOUNCES E-TICKET GUARDIANS OF THE GALAXY ATTRACTION COMING TO EPCOT — Looking ahead to the 50th Anniversary of Walt Disney World, Disney Parks Chairman Bob Chapek announced exciting plans across Epcot to realize the original vision of the park while making it more timeless and relevant than ever before, including a brand-new E-ticket attraction based on the rockin’ and action-packed world of Guardians of the Galaxy.
The Vice President of Epcot, Melissa Valiquette, confirmed that the attraction is a coaster to members of the media at the Epcot 35 celebration yesterday.
According to sources, the roller coaster will load guests in the former Universe of Energy attraction, launching guests through a tunnel into a 10-story tall show building. The coaster will reportedly be a first of its kind ride system, but it remains unclear how it will differ from a conventional ride.
The attraction will mark the very first roller coaster for Epcot in its 35 year history, the last remaining Disney Park on earth without one.