When Disney bought/took over the rights to the Star Wars franchise the canonization of the books and comics were sort of thrown out the window and placed into “Star Wars Legends”.
A category that places these stories and characters outside the official canon.
However, from time-to-time, we’ve seen Lucasfilm insert Legends characters back into canon the best example currently would be Grand Amrinal Thrawn, who was used in Star Wars Rebels. A character that is best known from the novelizations.
There seems to be another character that was seemingly pulled out of Legends quietly during the promotion of Solo: A Star Wars Story last year thanks to the book Solo: A Star Wars Story: Tales From Vandor, which has been making the rounds online recently on Reddit and various fan forums.
That Legends character mentioned in Tales From Vandor being mercenary hot-shot pilot Dash Rendar, who was first introduced back in 1996 with Star Wars: Shadows of The Empire.
How and when we could actually see Rendar show up is unknown, but sounds like being inserted in the Solo timeline would mean he would likely be connected to projects taking place between Revenge of The Sith and The Mandalorian.
The Kenobi series was confirmed by Lucasfilm during D23 Expo to take place during the events of the opening and ending of Solo. The upcoming series could be a spot where Dash could be inserted if there was a reason to.
The same could be said about the untitled Rogue One prequel series that will focus on a younger Cassian Andor.
There was a rumor recently that Lucasfilm was considering a new Star Wars series for Disney+ that could explore the criminal syndicate Crimson Dawn from Solo: A Star Wars Story that was seemingly headed up by Darth Maul this would suggest yet another opening where Dash could show up.
Recently, The Mandalorian showrunner Jon Favreau teased to EntertainmentWeekly his openness to include Legends characters such as Thrawn and Mara Jade in the series without directly saying he would includes those specific two.
That series takes place five years after the Return of The Jedi, so another spot where Rendar could appear.
I think we’re going to see a lot of gaps being filled with live-action and animated projects on Disney+ and if they’ll feature more characters like Thrawn is still a bit of a question mark.