I am hoping...I do think there will be some used D4 bodies that will be "reasonable" - whatever that means when you are talking a camera body for $6500 new (ok - now $6000 new)!!! Hoping a friend takes pity on me and sells me their used D4 bodies cheap! I'm guessing my friend will be upgrading to the D4s but I'm not positive...
I'm kind of surprised they didn't up the megapixels although I expect they did get input from the pros suggesting they didn't want any larger files to deal with. What surprises me most is the battery life. Eleven frames per second and just over 3000 frame battery life...Most won't hit that in a game, but some will. The specifications state that it can shoot about 200 JPG images prior to filling the buffer, but if you assume the buffer doesn't fill, that means the battery would need charging after about 5 minutes (3060 frames / 11 fps = 278 seconds or just under 5 minutes). It is significantly higher than the 900 images on my D600, but with grip I have two batteries that doubles my capacity. All that said, I know I've shot well over the 900 images per battery - probably closer to twice that number per battery - with my D600 and still had battery left to shoot.