Please note that the Viewliners will be ViewlinerIIs. ViewlinerIs are sleepers and a single diner. All the new diners, baggage-coaches, etc are ViewlinerIIs.
ViewlinerIs would have to be done in brass given all the underbody details (don't nitpick - the cost comes out the same regardless) whereas with the IIs it is covered and hidden and the same for all cars. The set being considered would include a Viewliner sleeper, diner, coach baggage and a dorm baggage with extras available. The [Am]coaches would probably be separate but at least you know if they are done all will be done.
The hope is that a Sprinter and/or a Charger can be done to go along with them as a set, like the Rockets, but... it would all depend on reservations.