Obi-Wan Kenobi cameo with Ewan McGregor
Only way to save this movie.
Have Obi-Wan in Mos Eisley buying some fruit at a stall when Han bumps into him in passing, Solo says sorry and Obi-Wan smiles and nods and then watches Han as he strolls to wherever he was going whilst clutching his beard in a pensive fashion before setting off on the long walk to the Jundland Wastes.
BOOM! appropriate crossover nod, classic Star Wars camera focus on a minor character for a bit too long shot, set-up for a stand alone Obi Wan movie and Ewan doesn't need to say a word and so we're keeping the costs down.
Come on Ron, there's still time to shoot this and fit it in!