Yes, this has been confirmed that MP Soundwave will have a North American release with all its cassettes. only thing we don't know is price. My guess is $100.
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Nothing about Red Alert though, but a while back Australia TRU is getting Acidstorm and maybe Canada
http://www.tfw2005.com/transformers-...-storm-176775/
I would say, wait until it becomes on sale @ Toysrus.ca so you can purchase/preorder, if you do though, do it immediately because you might have a hard time finding it.
EDIT:
Lets look at MP-10 Optimus Prime prices, both versions come with the same accessories, but different paint apps.
Takara $270 to $300
Hasbro $100 to $120
Now MP-13 Soundwave: at this time, only Takara's version is available.
$185 to $200 + $120 (Frenzy/Rumble/Buzzsaw/Ravage) = $300 to $320
So both Prime and Soundwave are equally in the same price range.