With so many live-action movies under his Utility Belt, there is no doubt that DCU's The Brave and the Bold Batman reboot will draw from movies past, and assuming his first live-action outing will be one of them, there are myriad lessons to be learned first. Batman's first live-action movie was a serial, a format in the old days that would see the story play out over multiple screenings in theaters. Being that this serial was released at the height of World War 2 in 1943 there are certain instances of it being a product of its time that could stand to be avoided.

https://screenrant.com/dcu-batman-first-live-action-dark-knight-lessons/