One of the really cool things about The Last Jedi is the way it grows, expands, and challenges our knowledge of the Force more than many of the previous installments of the franchise.
So its no surprise that writer and director Rian Johnson explored some other material dealing strongly with the Force while he was writing The Last Jedi – including, at the suggestion of Dave Filoni, the Mortis arc of The Clone Wars.
This makes a lot of sense, given what we know of the film and those episodes of The Clone Wars.
The Mortis trilogy is a three-episode arc during the third season of Star Wars: The Clone Wars that got into the nature of the Force in some truly new and intriguing ways. During the arc, Obi-Wan Kenobi, Anakin Skywalker, and Ahsoka Tano are drawn into this mysterious realm to the planet called Mortis, a strange place where time has no meaning and where the Force has a particularly strong connection. On this planet are three Force-sensitive beings, the Father, the Son, and the Daughter. Anakin Skywalker is drawn to the planet (along with his companions) because of the belief that he is the chosen one, and while there he and the others learn a lot about themselves and the Force. The Daughter (light side) and the Son (dark side) live in continual balance with a struggle for supremacy, and the Son launched a plan to capture and turn Ahsoka Tano. Ultimately, after all was said and done, all three Mortis gods died during the encounter, leaving balance once more.
It makes a lot of sense for Dave Filoni to recommend to Rian Johnson that he re-watch those episodes of The Clone Wars, since they truly dive into the Force in a way that Star Wars hadn’t before. Given what Johnson was trying to do (and succeeded in) in expanding our knowledge and understanding of the Force, these episodes should be considered essential viewing. It’s cool to hear about how Filoni, Johnson, and others at Lucasfilm all work together to ensure that the best product possible is put forward.
If you ask me, Dave Filoni and Rian Johnson collaborating on a Star Wars project is about as good as you can get.