I think it depends a lot on his deployment. If he's able to play with a skilled half zone player like Huberdeau, he's going to score a lot of points. Since Bennett is extremely strong in transition, having a guy who can convert in the offensive zone after a successful transition is going to lead to a lot of points for Bennett.
If he's paired with more "well rounded" north-south type of players (like he was for a lot of his time in Calgary), I wouldn't expect him to be as prolific of a scorer. Bennett is a capable half zone offensive player, but his really a lot more effective as a facilitator. A guy who gets you into the offensive zone with control, can force turnovers, make consistent medium to high danger passes, and crash the net hard.
He's not a guy with elite puck skills and composure, and he's not a pure sniper. He's not really elite at any one thing, but he just does pretty much everything. But that's the exact type of player you need to complement a guy like Huberdeau, who is elite in a few areas and very flawed in many others.
If he stays with Huberdeau then 80+ points is certainly not out of the question.