Well, I saw this is more about "potential" and not the necessarily the best U22 players right now. Here's Sweden.
Goalies
Henrik Lundqvist
Magnus Ã…kerlund
Defense
Johan Fransson - Lars Jonsson
Oscar Hedman - Tobias Enström
Richard Demén-Willaume - Daniel Fernholm
Forwards
Robert Nilsson - Alexander Steen - Loui Eriksson
Johannes Salmonsson - Carl Söderberg - Fredrik Sjöström
Jonas Johansson - Yared Hagos - Andreas Jämtin
Alexander Sundström - Tom Wandell - Nicklas Bergfors
Goalies: Nothing to complain about there, two very talented goaltenders.
Defense: Not great depth, 3 strong names in Fransson, Jonsson and Hedman though.
Forwards: Very good depth, not many with "star" potential though. The fourth line could turn out to be the best one, but they are all born 1987 and have a long way to go.
-------------------EDIT:
Not going by potential, I'd guess it would look something like this.
Goalies
Henrik Lundqvist
Magnus Ã…kerlund
HM: Joakim Lundström, Christopher Nilstorp, Chistopher Heino-Lindberg
Defense
Johan Fransson - Lars Jonsson
Oscar Hedman - Daniel Fernholm
Tobias Enström - Simon Skoog
HM: Robin Jonsson, Staffan Kronwall
Forwards
Robert Nilsson - Alexander Steen - Loui Eriksson
Andreas Jämtin - Yared Hagos - Fredrik Sjöström
Jens Karlsson - Jonas Nordquist - Tim Eriksson
Johannes Salmonsson - Joel Lundqvist - Jonas Johansson
HM: Carl Söderberg, Nicklas Danielsson, Martin Samuelsson