The way things are going with recent management history in Buffalo and Edmonton, I wouldn't be surprised if the following happened:
1. Bouchard for Dahlin
2. Bouchard busts in Buffalo, gets traded for Nylander. Bouchard goes on to become a HOF defender in Toronto, Nylander flames out as a 40 point second liner in Buffalo.
3. Dahlin busts in Edmonton, gets traded for Boeser + Juolevi. Boeser pulls a Lupul and never amounts to anything here, Juolevi pulls a Smid and becomes an "underrated top 4 defender." Meanwhile Dahlin goes onto to become a Top 10 defender in NHL history in Vancouver.