I feel that Sweden will be strong as hell this year. You have a pretty big potential to add something from the playoffs. The first round ends 2-3 weeks before the tournament starts, so ther is certainly going to be some additions.
If you could add Landeskog and Soderberg, you would already have basically two forward lines from the NHL. Obviously getting OEL, Stralman, and maybe Karlsson would be huge, but you have other possibilites also, even if they didn't go, like Ekholm for example.
OTT-BOS (Karlsson)
TOR-WSH (Nylander)
NYR-MTL (Zibanejad, Fast, Lindberg - all are RFA though)
CMB-PIT (Wennberg (RFA), W.Karlsson - Hornqvist, Hagelin)
CHI-NSH (Kruger, Forsling - Arvidsson (RFA), F.Forsberg, Jarnkrok, Ekholm)
STL-MIN (Steen, Berglund / Brodin, Eriksson Ek)
CGY-ANA (Backlund - Silfverberg, Rakell)
SJO-EDM (M.Karlsson (RFA) - A.Larsson, Klefbom)
Sure, some might be a little injured, and some maybe wouldn't go due to being RFA. But still, there are many players who could realistically be added, like Nylander, F.Forsberg, or Backlund.