Small sample size warniing on my post.......BUT here goes:
Petan is a really good player and might have a roll on the team but there is allot of talent and only so many small skill guy positions available. This might come down to what type of team Sutter constructs but I assume he will want to get back to playing Canadaian Junior hockey as in more size and grit to balance the skill.
Comrie will be in a dog fight between 5 guys for 3 spots but I wouldn't bet against him.
when it comes to Morrissey I am probably too close to this to be objective but Josh played two games against the Russians and was never on the ice for a goal against. He had two different D partners and they both seemed like like they were the best D men on the ice the night they played with him (Pulock and Reinhart). All the other young D men had there ups and downs but Morrissey made two or three minor mistakes over 2 games. He reminds me of a bigger stronger Enstrom with an edge. With his high IQ and skill set once the puck touches his stick he gets the play going the other way instantly. He also makes nice reads jumping into the play and in the O zone he is dangerous while remaining responsible (picks his spots).
Given the fact he wore a letter on his chest and was in the top pairing both nights I believe he will be on team Canada. He is just away to skilled, safe, smart, and reliable for a coach to not pick him to play anywhere let alone on a big ice surface.
Dumba and Reilly could end up being sent to team Canada and there may be pressures that push Josh out but right now its looking good (I would take him over Dumba for sure but that's just me).
Last point watching the subway series and seeing other 2013 drafted D men struggle that were taken above him like Nurse, Morin, and Bowie, Heatherington who were drafted after him it makes me think we have got ourselves a heck of a pick in Morrissey at number 13.