Canon and Nikon often go head to head with pro gear. If they update the 7D to something like the 7D mkII with more mp's and other upgrades will Nikon then upgrade the D300s to the D400? If not, that would give Canon the top spot for a pro DX body. I'm willing to bet Canon updates the 60D to compete with the D7100. I'd also bet on a D400 if Canon does update the 7D.