Assuming Matt Reeves’ version of The Batman really does center on a younger version of the character, he’s definitely going to have to be recast anyway.
Assuming Matt Reeves’ take on The Batman looks at a younger version of Bruce Wayne, that’s going to change a lot.
Matt Reeves has been hard at work on putting together his version of The Batman ever since Ben Affleck stepped down as the director.
This version of the DC universe kicked off in 2013 with Man of Steel and, somehow, a solo Batman movie has yet to go into production.