Suspect not - any legalization package I have seen floated about the policy tables includes a major revenue component. Without a huge excise tax revenue incentive, I doubt any major Western government (ie Canada or the US) would genuinely consider a legalization initiative - and a daresay, until the US changes and/or Canada changes its government - will we see any action at all.
(I'm a tax policy expert for an economic think tank based out of the UK - a resident of Canada, but have been working overseas for the past 6 years including East Timor and Afghanistan)
That said - the problem in Canada is huge insofar as there is a burgeoning middle class growing from professional growers who are generating six figure (for home-based operations) incomes, under the radar of both law enforcement and the Revenue department, contributing little to no benefits (apart from consumption taxes, GST etc...) to the local economy. In the community where I live, the verification and enforcement section of our local tax office (Vancouver 'burbs) could devote 100% of its resources to audit / prosecute grow ops for tax evasion after being reported and shut down by the RCMP (without any criminal charges...) I personally suspect that lots of small-medium growers are operating completely under the radar.
I'm a proponent of North American legalization in a controlled fashion, including a robust package of revenue enforcement. What you have today is similar to 18th century tobacco farmers producing a hugely profitable cash crop with 0% tax base. I find this offensive personally as a taxpayer...
-AH.