What if the 1990 Flash TV series was apart of the same universe as Batman (1989)?
Had the 1990 "Flash" TV series w/ John Wesley Shipp had lasted beyond one season, could you have seen it expand to include the 1989 Batman universe?
I am well aware that in one episode, they play it off that the Tim Burton/Michael Keaton movie was just that a movie. Basically Barry Allen is walking out of a movie theater that was showing a double feature of the 1978 Superman movie w/ Christopher Reeve and the 1989 Batman movie. And in another episode, Barry mentions Lois Lane in the context of her only being a fictional character.
I bring this up because CBS was clearly influenced by the massive success of "Batman" when they put "The Flash" on the air. They even went as far as to recruit Danny Elfman to do the main theme tune. And plus the color hues and lighten and the way that Flash's suit was designed was clearly inspired by "Batman".