With Grand Admiral Thrawn using a new Imperial weapon, it's time for all parts of the far-flung Rebellion to come together and wage war in the upcoming fourth and final season of Star Wars Rebels. As the new trailer shows, it's going to get intense for the Ghost crew.RELATED: Star Wars Rebels' Viewing Schedule is a Little ComplicatedWhen we last left the Rebels in Season 3 of Disney XD's animated series, they were able to escape the clutches of the Empire, but only with heavy casualties and the loss of their home base on Atollon.

As the season begins, the Ghost crew will reunite with Sabine Wren, who left them late in Season 3 to help bring the Mandalorian families together to fight the Empire. Based on the footage from this new trailer, it ... doesn't entirely go well for them. We know that, at the very least, Hera and Chopper will live past Rebels, as  they were both seen in Rogue One: A Star Wars Story. But as for everyone else? We'll find out this season.

Returning on Disney XD on Oct. 16, Star Wars Rebels stars Taylor Gray, Freddie Prinze Jr., Vanessa Marshall, Tiya Sircar, Steve Blum, and Lars Mikkelsen.