Can't say if there will be a new FF "entry camera".
Can say - the 5Dii is already all but discontinued. Canon's way is not "officially" retire a model until well after their own stocks have been depleted and then more time, to allow dealer's shelves to be depleted. They have always, with maybe one exception, done it that way.
As for a "6D", you wont see that number in Canon's nomenclature for a single digit camera. Never has happened since day one. Its always been 1, 3, 5, 7, 9, not necessarily in that order.
I think the long rumored 3D is getting more likely every day. Maybe we'll see that as the "killer" and the 5Diii move down some more. Thats another thing that Canon has done traditionally. I think they're at mid level bloat right now... low end should drop some more, mid level spread out a little and/or be trimmed.
Canon has had very predictable marketing - for the most part - its just what feature set they'll offer thats up to being questioned.
I can see them doing a 5Ds (or similar suffix other than "X"), as a lower end 5 series, but not a 6 series, or sensor upgraded 7 series. The niches Canon carves are carved deeper in stone - traditionally - than you might realize, unless you have followed the company since the late 60's.