Based on execution/pacing alone he has much more in the tank I'd think. 2:38 opening 1 KM and then ~28:41 through 10 km (1:00:31 pace). Hopefully it can translate to a great marathon in the spring!
He has matched up his 5k/ marathon Mercier conversions- 13:15 PB = 2:09:46 really well. His PB is 2:09:25. Yet his 10km 27:07 is equivalent to 2:06:19 . Could be small sample size on his marathon races. Of course we know that conversions up to and including the HM can be thrown out the window when it comes to the marathon. However, I would hazard a guess if any CDN is going to convert to the Marathon, it would be Cam (unless Mo ever attempts), given his years of high mileage background, and he appears locked in on going after fast marathons but it does come down to some luck on the day coupled with a near perfect build, nutrition, weather, pacing- what could go wrong?