There was a Super SNES version of Kirby Star Stackers that was released in early 1998 in Japan that was never released outside of Japan. Of course this was well over 1.5 years after the N64 was released and we did get the Game Boy version of the game in 1997, so it's understandable why that didn't come over.
In the case of this new Kirby game though, since it's an original title and the 3DS is still only a few months old, plus the fact the 3DS can play DS games, I'd say this game has a 100% chance of making it to North America.