https://www.esquire.com/entertainmen...en-ehrenreich/
I remember there were some rumors that there were some plans for this before the director shake-up, but now it appears to be confirmed if the film is a success.
Although a lot of the story is unconfirmed of course, it looks like it at least deals with Han meeting Chewbacca and Lando, and of course getting the Falcon and maybe the Kessel run and his brief Imperial past; perhaps the sequels might focus in some part on the beginnings of him working for Jabba the Hutt. and perhaps include Boba Fett?
Or maybe this could just be some cameo thing in later films (Maybe even a Boba Fett film?)