David Gordon Green might not end up directing any more Exorcist reboot movies
Green isn't necessarily getting the boot, he just... might not have time in his schedule for more of them...

For reasons we can’t possibly imagine, it suddenly sounds like David Gordon Green might not end up directing two more Exorcist movies after The Exorcist: Believer—though, to be fair, that was always the implied plan but not literally the announced plan, so Green and Universal have some wiggle room here and this doesn’t necessarily mean he’s been fired. This came up in a chat with The Hollywood Reporter, during which Green said (after a brief pause, apparently) that he’s just “navigating [potential future movies] from a story perspective” and that he’s going to be “looking at my realities of life” as he switches between Exorcist movies and his work on HBO’s The Righteous Gemstones. He says he’ll be “thrilled” if things work out and he can make this next movie, but he’s not officially on board yet.