In a discussion with Senator Peter Stollery on the subject of what Canada failed to included in NAFTA, and this was before he retired at age 75, the subject of energy came up. It was excluded, and to Canada's cost. However, if NAFTA were to be re-negotiated, then energy should be back on the table.
As for the Mexican auto production advantage, there is the economic geography factor which weighs heavily on the logistics of auto part and finished auto transportation. Mexico can ship east to west with ease, not like Canada which is very wide in comparison, and is ideally situated to ship north to the U.S. and south to Central and South America. So, for example for a company like Volkswagen, when it came to manufacturing outside of Europe, Mexico was the logical choice, apart from labour cost advantages, from the logistical standpoint. So Canada cannot return to the auto manufacturing base it had when NAFTA took effect.
So Canada needs to export oil from the Atlantic coast. Badly.