Here's an image from Hasbro showing both Han Solo and Chewbacca in chains. This indicates that the backstory we've known for years is most likely the path they are taking. Chewbacca was condemned to slavery by the Galactic Empire in the mines of Kessel. It is here that Chewbacca was rescued by Han Solo, and swore a life-debt to Solo and accompanied him throughout his smuggling career. Just a small piece of the puzzle we get to see in May!
Solo! Solo! Too Nakma Noya Solo!
Solo Cinema Concession Stand Packaging Products
Two New Imperial Ships From Solo: A Star Wars Story!
Hasbro's Solo: Star Wars Universe Display From Toy Fair
The Forcecast: February 16th - More Solo
New Solo Literature Announced!
Jon Favreau Confirms Solo Character He Is Voicing