Lens wise, I hope it arrives with:
24-105/4L IS II (or 24-120/4L IS to match Nikon) for which there were rumors about a year ago that it would arrive with the 5D3
24-70/2.8L II (or IS, or better yet both ways like the 70-200s are) for which there have been endless rumors for MANY years
100-400L II (unlikely) for which there have been space rumors, but I would really like to see get a refresh (mostly coatings and 4-stop IS, perhaps a more traditional twisty zoom)