Rogue One: A Star Wars story, was the first stand alone venture for the franchise. It was widely accepted by fans and movie critic’s alike. Veteran actor Mads Mikkelsen was cast as Galen Erso, a human male scientist and leading galactic authority on crystallography. Erso’s skills and knowledge lead him to being a key figure in the construction of the Death Star, even though Erso was reluctant to do so.
April 7-10 2023, the annual Star Wars Celebration is set for London England. Mads Mikkelsen has appeared on the celebrity guest lists. This has nothing to do with Rogue One, it does however have everything to do with Andor.

It has been teased that Season 2 of Andor will feature some characters from Rogue One as they bridge the gap in story and timeline. Therefore, having Galen Erso is a smart move. When Erso is first introduced he has left the Galactic Empire and was hiding on Lah’mu where is eventually found by Orson Krennic.
Purely speculation on my part, but perhaps Galen Erso, his wife and infant daughter Jyn are preparing to escape the Empire during Andor Season 2. Allowing him time to get far away and beginning to settle down. Andor takes place 5-years before Rogue One.

One interesting connection is that Mads Mikkelsen’s brother Lars, voiced Grand Admiral Thrawn on Star Wars Rebels. Rumor has it that Lars would appear as a live action Thrawn on Ashoka. Lars has denied this is the case, but the rumors rage on.
Galen Erso appearing on Season 2 of Andor shows that Star Wars is indeed heading in the right direction as far as connecting the entire story. The next Star Wars film is said to be coming in 2025, that would be six years after The Rise of Skywalker was released. Let’s hope Disney/Lucasfilm learned a lesson and have a concrete direction for the next film or films.