I don't think they know what they want. Maybe Alvarez has a better idea than Cox. I just think they have the beginning and they have the set up for the end, and plan on filling in the middle. But, because they are ONE team, they can stick to that goal easier than, say, it being handed off to multiple studios/teams(like the original) ideas entering the fold that jinx up the continuity a bit. It's the whole "too many chefs in the kitchen" deal.