I'm not certain we'll get it by any means, but I'd say it's certainly still possible and looking good. After all, this game sold pretty well in Japan, and Vanguard's doing pretty well in the US, as far as I know. I know the anime is on Crunchyroll and being dubbed, and dubbing is hardly a cheap endeavor. The 3DS is not lacking in install base either, so there's certainly an audience, and there's always that shot at the cross promotion of getting the people who buy the 3DS game to start buying cards.
Nintendo 3DS Friend Code: 1032 - 1243 - 4711 Name/NNID/XBLGT/PSNID: mmarkster Kingdom Hearts with Nintendo Universe = win!