They don't need any studio approval or involvement to look for a writer or do a treatment or an outline. From my understanding those types of things happen all the time before studios get involved. Or he could just mean finding a writer to propose to the studio. The ONLY thing different about this claim is that he's transitioned from continuation to reboot. It's still nothing but smoke right now.
Not to mention that he didn't even say that they have started to write it, he says "pretty soon we'll have to start looking for a writer." I have no idea what that means.