Since it's reboot (whatever that means) im pretty sure we will see Graham again in the main role.
But you never know. It occurs to me that it could be, maybe, a character per episode. Like one same story, but seeing it from different angles, from the different characters. And with each perspective you finally put togheter the whole thing.
But that's just an idea, not what i think it will happen.
So, maybe in another future game, who wolud you like to see?