The scene us actually the introduction of Wash in the Firefly series. We see him in the pilot’s chair of the Serenity playing with his toy dinosaurs. The dialogue in the clip is exactly what we hear Wash say, only this time, it’s K-2SO, and instead of playing with dinosaurs, he’s got Stormtrooper action figures. Because apparently, even within the Star Wars universe, merchandise is a thing. I suppose it’s the equivalent of playing with green army men in real life?
Article source: https://www.cinemablend.com/news/2495822/rogue-ones-alan-tudyk-reveals-hilarious-deleted-scene-inspired-by-firefly