Just my luck, my dream camera will be announced...pre order...I'll drop my mini-fortune on it...and the day it arrives is the Mayan end-of-the-world! Aaaaggghhhhh!
There won't be a CR3 for a 3D, so you'll get old waiting.
The CR3 is used when its absolutley certain that a product is coming. This usually means a accidental posting on a Canon web site, or a organization which is under NDA accidentally making a article live.
About 1 week or less before announcement is the usual.
If 7D mk2, 5D x (or mk3), 3D, 70D and 650D as well as a whole bunch of lenses get released this year, what are we going to speculate about in 2013??? ;D