I'd be surprised. I think he will be pretty far down the depth chart next year. Probably gone after that.
I could see them keeping Brossoit if he is reasonable in his contract expectations. IMO, he played better than his stats this year which makes him worth keeping. But those stats make him worth less $$$.
I also like Hunter's idea of using the backup goalie position to leverage Dunn out of StL. I'm not sure his 50% retention gets it done though. Might need to take less retention. I don't think Blues are going to be able to keep Piet, so they will be down to 6 D. Not sure they will be willing to also lose Dunn but they may not have much choice. If they like Niku as a replacement, it might work. If not, maybe they would like Stanley. Better defensively than Niku. And I heard he is pretty big.
Allen, 40% retained (they pay 1.74, we pay 2.61) + Dunn - for Stanley + 2nd + ?(we don't have a 3rd this year) maybe '21 3rd.
It might have more to do with not wanting to bury cash in the AHL given the pandemic.
I wouldn't have mch of an issue with Hunter's idea either but that puts us in a pretty precarious situation regarding the Seattle expansion draft if the Jets also are able to reup DeMelo.
As far as blocking prospects, Imo the team is going to have to win in the next four years to take advantage of the Scheifele window so imo we need to run with a more experienced defense and let prospects force their way up the lineup. If that happens you can always make trades to move players out. Also I doubt Heinola is in the teams plans for the next year or two, he is better off playing big minutes and gaining strength in the AHL.