I just watched Norang: Deadly sea. The visual depiction of the Ming navy was pretty awesome but man they did my man Chen Lin dirty.
I feel like a Chinese made movie about the Imjin War based on Li Rusong would be pretty epic. Ming Dynasty soldiers vs Ashigarus and Samurais would be quite the great to see on screen.
I would personally start the film with depictions of Hideyoshi sending off the massive Japanese invasion fleet, narrated voice over summaries of Japanese early conquest, then to emperor receiving news of Zu Chengxun and Shi Rus defeat, to Emperor declaring Korean rescue, to Li Rusong taking command of 30000 Ming Troops, to Li Rusong's scouts and then the liberation of Pyongyang.
Sequel can be the battle of Byeokjegwan and the liberation of Hanyang.
Final movie should be about Chen Lin and Yi Sun Shin.