Thank you all for your help!
Judging by your replies and everything else I've read, I don't think it's wise to jump the Canon wagon right now. There are too many uncertainties there. I don't feel like investing in lenses and accessories, based on guesses and hopes.
Canon, like every other company, make money and they'll do whatever's best for them, not for me.
So, I'm going to wait until the end of December and if there are still no FF news coming from Canon, I'll go with Nikon D750 and 24-70. It's out of the question to wait another 6 months or more to find out IF their majesty, Canon are going to do something. Not just because I'm impatient - simply because life is too short to be wasted on blind expectations.
If I was you (this is my own honest opinion) I would focus on what im going to be shooting and what I want my pictures to look like, any camera today will give you top notch image quality so forget the camera. what you want is to focus on your lens options, if you want more options to focal range get a canon. now if you want to shoot fast things get the 5D3 if your skills are not sharp, (but if it is, a 6D will do the same thing,) it will be more forgiving with moving things, for your lens choices you will already be in the place to get the right glass that fills your field of view. When your ready to sell the 5D3 will hold better value.