The photo, which was posted on Reddit, reportedly shows a TIE Echelon. How the TIE Echelon ties into the park's story and the Red Fury squad was detailed yesterday, and if this is indeed the TIE Echelon, that story would then indicate that visitors will be unable to enter this attraction.
Some users also remarked that the new spaceship looked similar to the TIE Reaper, meaning that it may be some sort of transport. A TIE Reaper appeared in 2016's Rogue One: A Star Wars Story and was used to shuttle death troopers into battle.
At this time, it's not clear if this will appear in Episode IX, and it's likely that any appearance will be limited. Still, this image combined with the park's story description indicates that this is indeed meant to be a First Order vehicle of some sort.
Directed and co-written by J.J. Abrams, Star Wars: Episode IX stars Daisy Ridley, Adam Driver, John Boyega, Oscar Isaac, Lupita Nyong’o, Domhnall Gleeson, Kelly Marie Tran, Joonas Suotamo, Billie Lourd, Keri Russell, Matt Smith, Anthony Daniels, Mark Hamill, Billy Dee Williams and Carrie Fisher, with Naomi Ackie and Richard E. Grant. The film is scheduled to open on December 20.