That might be a little too young. The only veteran winger you have there is Marchand. And then more kids on defence. And leave you with more than $15M in unused Cap Space.
I'm excited to see what kids make it over the next two seasons but don't think they have to rush too many in at once.
I kinda hope Sweeney trades for two wingers with one or two years left on their contracts - allowing the kids call-ups and more time to develop. Rick Nash is $7.8M but only has one year left. E. Kane is $5.25 with one year left. Kovalchuk could be an option if he's willing to sign for two years. and a few others.
Marchand - Bergeron - Pastrnak
Nash - Krejci - Kovalchuk ($5)
Beleskey - Backes - Heinen
Vatrano, Kuraly, Nash, Acciari, Schaller, DeBrusk, JFK
I don't know. I'm bad at this but wouldn't mind them having another year of easing the kids into the line-up. And also think that what should be a pretty solid defence is going to cost under $15M the next two years (which is amazing) and you've got to try and take advantage of that.
I've got the capspace in my proposed lineup at somewhere between 6 and 7 mill.
https://www.capfriendly.com/armchair-gm/team/340098
I buried Hayes and Beleskey just because of the likelihood of having to retain some sort of salary getting rid of them and McQuaid because I couldn't figure out how to edit him out as an expansion draft casualty.
It is a young lineup, but they also represent some of our best NHL ready ( or close to it ) prospects and we have room to add an addition later on as the year goes on if needed. Each of them is insulated a little bit by playing with one or more veterans on the same line.
I don't think Sweeney will make it as easy as I've made it for these kids to crack the lineup... I wouldn't be surprised to see him sign a veteran forward to help create more competition at camp. But I do think the youth movement ready to kick open that door and it's going to happen sooner rather then later.
I also don't think we can afford both Beleskey and Kovalchuk ( in response to your lineup proposal ).