The Coalition of Planets, a young alliance of worlds led by Earth, is at war with the Romulan Empire. Featuring a new crew of characters and set on board the NX-04 Discovery, the film explore the Romulan War (something Enterprise never got the chance to do). Most fan films have focused on the original series era in the 23rd century, with a few dabbling in the 24th century TNG era, but the upcoming 'Star Trek: Horizon' film goes back to Star Trek: Enterprise’s 22nd century. Watch the trailer and learn more about the show below. 'Star Trek Horizon' takes us to Star Trek: Enterprise’s the 22nd century and the Romulan War. A Star Trek new fan film has released its first full trailer.