It's not far-fetched to believe that they will use Barry Allen in the film, just as they did with Hal Jordan/GL.
Barry is the "first" (the first modern) and most well-known Flash, and for a cinematic treatment, the character's debut in big blockbuster productions, he will be the one.
Now let's discuss directors
Barry is the "first" (the first modern) and most well-known Flash, and for a cinematic treatment, the character's debut in big blockbuster productions, he will be the one.
Now let's discuss directors