I think the field looks a "little different" because I think it's the Delta Field(Or a more complete variation) that was tested at River Rage. They were confirmed as being wider.
http://www.chiefdelphi.com/media/photos/34329
The main thing about this hint that I gather is that if this is indeed showing a loading gate in the middle of the field, which you can't be certain of, but if it is, then the only reason to put it in the middle would be if there's something in the way of having the loading gates in their normal places. Maybe large scoring structures in the far ends?
Luckily we only have to wait 3 more days...
Edit: two above me have said almost the exact same thing.... therefore we must be right
