Personally, I find it ridiculous that Apple would develop a single core A5. With the A6 and possibly the A7 being out there, not using a full A5 is a stupid move. Waste money redesigning the A5, have yet another part to stock, for absolutely no reason. Dumb. Dumb. Dumb.
I highly doubt apple would make the decision to spend millions to fab a new chip design without factoring in the costs and what they plan to do with that chip/design. Whatever they have planned will likely make this choice profitable and not dumb. So lets not jump to baseless conclusions when we have no idea what apple's plans really are.