No need to fear. NHL5 was the only Canadian exclusive SERIES they've done. There have been a couple of other Canadian exclusives, like 2 2-packs, and the Team Canada 3-packs. The stuff that's just been unveiled will be available all across North America.
I think Canadians fear Canadian exclusive series' more than our US counterparts do

It sure wasn't much of an exclusive series either. Distribution has been bad in terms of number of cases and stores carrying it. TRU's put out three cases each. Whoo hoo

Walmarts probably put out 15 cases in most stores, but that's down considerably from NHL4 where "my" Walmart put out about 40 cases in total. Other stores have yet to stock it, so in general distribution is awful.
I did fine with it, but I ordered two cases and I'm well enough connected with hockey collectors that I had everything at one point. I'm now downsizing it to what I want to keep.
End of story, I hope they never do an exclusive series for Canada again. STuff like the 3 packs or 2 packs are manageable, this wasn't.