Dubois is the only forward who would be a surprise to me. He's good enough and I like his game, but it would be a surprise in the same way Crouse was.
Something interesting with regard to a player like Merkley is that he is one of several playmaking wingers that Canada will be choosing from. Canada generally has playmakers at centre and goal scorers on the wing, so it's interesting to see players like Marner (presumably a wing this tournament) Beauvillier, Konecny and Merkley being strongly considered in some cases. The presumed top three centres (Point, Barzal, Strome) are all strong playmakers as well, so it will be interesting to see how things fit. A player like Merkley would be a great fit on some editions of team Canada (like 2014) but I don't know that his skillset is all that useful with many forwards already doing most of the same things (minus the agitating). My guess is that a player like Gauthier, who is similar to Merkley in terms of ability, had a big advantage because he is one of the few goal scorers at the camp.
Crouse Point Marner
Beauvillier Barzal Gauthier
Watson Strome Konecny
?????? (Stephens) (Hawryluk)
???????
My guess is that nine spots are gone already. Hockey Canada likes Stephens, so he probably has a good chance despite his injury. Hawryluk has looked good in the evaluation exercises thus far and is having a good year, so if he's healthy I think he's a very strong candidate. Last two spots will depend on who performs in the camp, with some players (Dal Colle, Perlini) probably getting the benefit of the doubt.