Lucasfilm is currently developing a new Star Wars movie starring Rey Skywalker (Daisy Ridley) and her mission to restart the Jedi Order after the events of the sequel trilogy. This will likely involve building a new temple where she can begin training young Force-sensitives in the ways of the Jedi. Though it may come as a surprise, Star Wars already has the perfect world where Rey could start rebuilding her New Jedi Order.
When Luke Skywalker attempted to create his own academy after the original trilogy, The Mandalorian confirmed he built his temple on the ancient Jedi world of Ossus. This makes sense as Luke was very determined to replicate the old Jedi Order as closely as possible, explaining his desire for all kinds of texts and ancient artifacts relating to the Jedi of the past. However, the temple was ultimately destroyed following Ben Solo's corruption to the dark side, motivating Luke's subsequent exile. Now, Rey has a chance to create a better Jedi Order, and Mustafar would be the perfect planet for a handful of compelling reasons.
