Fan Casting "An Old Ally" in Star Wars: The Ghost Prison

Fifteen years pass, and Vader is called to The Imperial Palace, where Palpatine assigns him to the planet Batuu to deal with a "stirring on the planet". Vader goes to leave, when the Emperor tells him that an old ally will be going with him. Vader first asks if it is the now Grand Moff Trachta, but Palpatine dismisses it, proclaiming it to be someone Vader met on Batuu years ago, and someone who has taken over Gentis's flagship "The Successor" and renamed it "The Chimaera". Enter: Grand Admiral Thrawn.