Emperor Palpatine has been revealed in the official Star Wars Rebels Mid-Season 4 trailer! The new Star Wars Rebels Mid-Season 4 Trailer (Official) shows Yoda, Emperor Palpatine (Darth Sidious), Kanan with a new look, Ezra, Sabine, Hera and many more of our favorite characters as they battle the dark side in the Star Wars Rebels series finale. How will Star Wars Rebels mid season 4 end, especially with The Senate or Emperor Palpatine in the mix?