10 Unused Star Wars Movie Sequel Concepts Which Need To Be Used In Future

10. Darth Vader's Castle On Mustafar

Rogue One: A Star Wars Story took fans to Darth Vader's home on Mustafar when Director Krennic found himself brought to his knees by the Sith Lord. The movie didn't spend much time there, unfortunately, but there was once a plan for the castle to serve as Kylo Ren's new base in The Force Awakens (hence why a squadron of TIE Fighters are shown leaving here).

This version is quite a bit different to what ultimately ended up on screen, and is depicted as an ancient fortress. A foreboding and quite frightening structure. It also feels like a fitting home for a Sith Lord, and somewhere a "wannabe" like Kylo Ren would definitely want to make his own.

Giving that villain a base could have worked really well in The Force Awakens, but with so much time spent on both the First Order Star Destroyers and Starkiller base, it seems there just wasn't time to include Vader's old home and further explore it beyond a few recent comic books.

Moving forward, however, any story including Vader - or even set after his demise - should further explore this castle and what became of Mustafar when he lived there.