I don't follow the GH line much, so I don't know what they are or aren't getting this year... A Death Star would be cool.
However, Adam's wrong on the box beside the Death Star. It's not a box of Galactic Heroes figures. My unedited photo proves it's something else that's larger.
Also the two who took the picture were conversing with me at the time, and said this item (the mock-up) is bigger than the BMF by a bit. I recall that quite clearly as the excitement was tough to contain between the three of us, over the phone, while one admired architecture.

On a completely different note, I got an email about what exactly the item is, that is pictured (prototye? Mock-up? Something else?)...
A separate source, a friend of mine who works in the toy industry at large, specifically cited a mock-up of the Death Star identical to this has been "passed around" (his words) at meetings at Hasbro. This is simply a mock-up to get an idea of scale, size, features, and how to cost-out something like that... Basically brainstorming "how to get it done" at meetings... That doesn't mean this is what it'll look like, or that this is guaranteed to get made. It's also maybe not even the ONLY Death Star mock-up in existance... It's just a tool. Someone's idea put into a physical form to see if it'll fly. That's all mock-ups are, ultimately.
As a scratch-build customizer, I make mock-ups to provide a basic size/shape of a vehicle project I'm starting, for instance. It gives me an idea of the ammount of materials I need to purchase, and also some basic ideas of how to engineer the item so it's stable and some of the more basic functions and if they're possible.
Hasbro and other toy companies do the same thing... It's usually the most basic of first steps before the item is even confirmed to be slotted in anywhere. You have to get past feasability first of course.

I had a couple questions on that though sent to me privately, and just thought I'd get that out there.
This Death Star is not "small" mind you, however that doesn't mean the same idea cannot be transferred across different lines within the brand either. I think a GH Death Star would be a cool idea, and probably have better legs than in the 3.75" world.