If the team were picked right now I'd have to think he would be on the outside looking in, but like every year performance at the December camp will ultimately decide the composition of the team.
Points in his favour are: 1) game-breaking shot and scoring ability from the left side; 2) good size; 3) key piece of Memorial Cup championship team (i.e., the experience factor); 4) strong skater; 5) draft pedigree.
Conversely, as has been discussed he's off to a slow start. While not bad defensively, his contributions would probably be limited to an offensive role, so he's not an ideal candidate to slot into a bottom-6 / 13th forward type of role on the team. We're also fairly deep on the left side this year, so he'll have strong competition for a roster spot (if he was a natural RW, he'd have a much better chance IMO).
Putting aside the slow start, if he's put in a position to find chemistry on a scoring line in the December camp alongside Strome, Point, Barzal, Marner and the like, and takes advantage of that opportunity, I think he'll make the squad. If not, and he performs like he did last year at the December camp, he'll be left off.