The latest rumors for Solo: A Star Wars Story indicate the spinoff will be making more Legends elements official franchise canon.
Mimban’s first mention in Legends was in the novel Splinter of the Mind’s Eye, where its inhabitants were called Mimbanites.
From the looks of it, Solo is going to borrow liberally from Legends, with Tag & Bink and the Cloud-Riders gang being in the film.
The first three Star Wars movies in the Disney era have included several franchise Easter eggs, and it looks like Solo could take the cake in this regard.