Greez mentions a castle on Takodana that is an excellent pub. This is a reference to Maz Kanata's pirate canteen seen in "The Force Awakens".
Legendary sound designer Ben Burtt ( Star Wars: Episódio IV - Uma Nova Esperança (1977), Os Caçadores da Arca Perdida (1981), E.T.: O Extraterrestre (1982), WALL·E (2008) ) provides the voice of droid BD-1.
Jaro Tapal, Cal's Jedi Master, is a Lasat, the same species as Zeb Orrelios from Star Wars Rebels (2014). The Lasat species was based off of early Ralph McQuarrie artwork for Chewbacca.
Takes place 5 years after Revenge of the Sith (2005) and 14 years before A New Hope (1977).
The "Homestead" poncho is taken directly from the artwork on the ceiling of Owen Lars' Homestead on Tatooine in Episode IV: A New Hope in the scene where they are eating dinner.