I think an iPad 3 with A6 is in the works, with Lightning, makes sense, but not at the same time the iPad mini comes out. No Way.
Each would cannibalize the other.
So the 5 Million people that were going to buy the iPad mini buy the revised iPad instead and the 5 Million people that were going to buy the revised iPad buy the mini? Doesn't Apple still sell 10 million units either way. I don't think Apple is worried about cannibalising from itself.