I don't think they will touch that option far too expensive, most probably make the F35 deal look cheap in-comparison.
Now this is just my personal opinion, the Canadian government can't do a Helen Clark the strategic circumstance at far different to the RNZAF. He has no choice but keep a air combat capability, but the choice of aircraft is a going concern, I believe the longer he delays the inevitable the more that F35 will prevail. I suspect that by 2018 if the Rhino line is still open he will buy 2x Squadrons worth of aircraft enough to enforce sovereign duties, the who ever get elected after its someone else problem hey.