Everything becomes clearer when "The Office" is attached to it.
Fact of the matter is that a script is already made. Only thing holding it up is Bill Murray. And since he doesn't want to do it (last time saying unless he died and was a ghost) and they aren't even going to redo the script to accomidate Murray's absense, equals the studio is making this in their own terms, and probably a new cast. I hope you're ready for a suck-fest.
This will probably transmogrify into a "re-visioning" later.