Oh yes there will. There will be movement back and forth across the Atlantic Ocean. With the cap level that's coming, I predict that the next Jari Kurri, Jaromir Jagr, Teemu Selanne, or Peter Forsberg will look upon the NHL as nothing more than a three-year hiatus in the middle of a European hockey career.
If you think the NHL has been dull over the last few years, just wait until you see NHL rosters filled with 7-8 fourth-line forwards.
One more point..Many of the NHL players are married, kids..and they don't want to uproot their families for 6+ months to go overseas, and the wives don't want their husbands off alone that long..Don't discount the domestic pressure..
I remember 1980, when Ken Morrow went straight from the USA gold medal team to the Islander's first Cup..