I’ve always thought it strange that in an Empire with “a lot of command ships,” Vader only uses an Imperator-class star destroyer while the Emperor commandeered the Executor. Based on the above idea of having Vader arrive in the Executor, I thought it would be fun if the Emperor arrived in the Eclipse from the old EU. Of course this would present some story problems, such as where it went after dropping him off at the Death Star, or if it sticks around, based on existing footage, how would the Rebels destroy it and the Executor? Probably not a realistic addition, but a fun thought.