That's only applicable if they all have an oar in the actual writing process. Merely being consulted is different.
And as I've written elsewhere, I suspect he already has been keyed in on what the story ideas were for the Scott/Cameron/Weaver project which never happened.
Would also be a little nervous, these days, about Cameron being involved. He apparently helped out with the story of 'Genisys', openly said he was pleased with the end result and look how that ended up.