There's been a lot of chatter about the EOS 5D Mark III replacement, most of it rooted from a talkative forum member at DPReview. We haven't played into it, because that sort of detailed information doesn't come out 6 months before the release of camera, it never has and it never will. Leaks out of Canon has tightened up significantly over the years (my bad), which makes the chanced of such rumors being true, highly unlikely.
There is no imminent announcement for an EOS 5D Mark III replacement and we'll likely be seeing an EOS-1D X Mark II beforehand. The rumored August 14, 2015 announcement date came and went without a new product from Canon, but we should be seeing something in the next month or so. Please be sure to check sources on posts, we do posts things that aren't told directly to us.
All that said, the EF 35mm f/1.4L II is the real deal and we should see that shipping before December of this year. Beyond that, the next Canon DSLR is an unknown at this time.
More to come…