I've analyzed to the best of my ability both of the possible preliminary 7965 Falcon models, and it appears that they are actually significantly different from each other. The first preliminary model of which a picture appeared seems to be approximately two studs wider than the last released system scale Falcon, 4504, as well as about three studs longer overall, while the most recently released prelim pic of 7965 is almost exactly the same width as 4504, while the new mandibles will make it about one stud longer than 4504. All three models have the same six stud gap between the mandibles. If set 7965 has a total of 1238 pieces, while set 4504 had just 985 pieces, there must be some sort of significant difference. It could be that it is a slightly larger model, as the first prelim image suggests, or if it is the same size as 4504, then it might have significanly more interior detail. "Detail" trends have been inconsistent with recent starwars sets; the latest Tantive 4 owes its high piece count to it's relatively hight detail, utilizing many of the smallest elements. On the other hand, the new AT-AT is almost the same size as 4483, but uses significantly fewer parts, and has much less detail in certain areas, especially the legs.
So... all things considered, something different definately seems to be up with the new Falcon. Worst case scenereo in my mind would be that the prelim piece count turns out to be on the high side and the actual model appears as the most recent exterior box shot shows (same size as 4504,) and has little improvement on the interior compared to 4504. Given all the evidence, I'm inclined to predict, based especially on the print-ready appearance of the box art in the most recent prelim pic for 7965, that we will be getting a falcon that is almost exactly the same external dimensions as 4504. I just hope it has a kick-butt interior. My favorite part of modding 4504 was creating the access coridor to the cockpit, but that may be a bit much to ask for as an interior feature. I'd like to at least see the layout of the main hold be more accurate--seating booth and game table on the right side instead of the left, etc.
Overall, I'm happy for rehashes like this, since it introduces diversity into the line and makes it possible for newcomers to have relatively easy access to models of the iconic starwars ships and locations.
On a different topic, is there anyone else like me who would like to see a revisiting of Yoda's Hut? I love the model from the years-back x-wing set. I think it would be an awesome stand-alone set. I also really prefer the original yoda mold to the new one with oversized clone-war eyes.
Who else want's a new Yoda Hut?