It appears it could be true, if you take a look at the following press release on the Canon site it makes mention of the EOS-1D X with the same release date:
Yeah, that does help with this a lot, but some of the specs are still strange, so someone could have made up some specs to throw in. At least we know the name of it Just have to see if the specs are right.
Specs or not that post proves something is being released. That should be joy itself !