Luke Skywalker's Jedi Temple on Ossus is a subtle nod to Legends lore, revealing his New Jedi Order's origins. Ossus, a Jedi library world in Legends, plays a crucial role in the reconstruction of Luke's Jedi Order in the new canon. Luke's choice to base his Jedi Temple on Ossus instead of Yavin 4 adds depth and history to the Star Wars universe.

Star Wars subtly introduced Luke Skywalker's Jedi Temple into canon in the sequel trilogy, but its location, revealed later, is one of the best Legends Easter eggs in the entire new canon. Luke's New Jedi Order was a huge part of the Legends timeline, but hasn't been nearly as present in modern storytelling. In the sequels, the new Jedi had already been brought down by Ben Solo, as he turned into Kylo Ren near the end of the New Republic era.

But canonically, Luke began his training temple sometime after 9 Aby,...