I don't see any gov't at least in Ontario having the gonads to put a stop to it.
Why on earth would they? Aside from a few cranks, nobody is going to thank them for it, much less change their votes in approval, but they'll be subjected to the fury of most of the province's nearly four million Roman Catholics and lose all their votes.
Not to mention the constitutional change would be long, complex and filled with lawsuits, and likely the government that initiates it would be voted out of power before it ever came to fruition.