A camera that works would be great...
Better ISO performance, great focusing, 12 fps, anywhere between 10-16 mega pixels is fine. I want full auto focus in viewer mode. Give me a new flash system to rival Nikon's flash performance and get me a new 100-400 lens f4 would be nice. Video I don't care about but as Mr Smith would say "it is inevitable". Oh and why not kill Nikon on price and sell the new body for under US$ 4000.
Santa are you listening??