Yeah, its since been announced at Amazon, Gamestop, and BestBuy I believe too.
Also, here's another similar announcement, but not sure if it warrants its own thread or not, so I'll drop it here and let the mods judge.
Source:
Italy Shows Double-pack Smash
Looks like Europe may be getting a double-pack of Super Smash Bros. 3DS. No price point yet, but I'd imagine it'd have to be cheaper than buying 2 copies. Not really a "collectors edition" but its a different edition nonetheless.