I'd love to see the GCN version recreated since I never played it and am too cheap to buy a copy online (and even if I did, I'd probably never get around to playing it).
I don't really see it happening though. AC is a franchise that relies heavily on online now, which wasn't in the GCN version, so Nintendo would have to rework a whole online aspect... and now that I've typed it out it doesn't seem as hard as I first thought, but I still don't see them doing it. Maybe in a decade or so when AC is up with the ranks of Pokemon and Zelda