In figure skating Korea has no horse in the race. Maybe that will change in a few years but as of right now, Russia is looking pretty good in pair, dance and especially ladies. Say what you will about the Russian federation but once they got the bid for Sochi, it seems like they started manufacturing figure skaters! There is a ridiculous amount of depth and talent coming out of Russia and they are all under 18 years old right now which means they'll likely be around for this coming quad and the one after that...
As for Korea, it'd be nice to see So-Youn Park and Hae-Jin Kim start skating well. I think So-Youn is gorgeous and I love her style; Hae-Jin is a lovely performer. As of right now they aren't making any waves and without Yu-Na to buffer their chances, there's a good chance Korea might disappear from figure skating if those two (or someone) doesn't step up and start skating well.
The next four years will be very interesting, that's for sure.
It could be like Nagano in 1998, when the Japanese didn't have any contenders in the races. We saw in SLC, Torino, Vancouver and now Sochi that there were hometown faves who were expected to medal if not outright win (and in some cases did) and not just show up and collect polite applause.
If the current crop of Russian juniors aren't worn out by the end of the next quad, bet on there being many dozens more to replace them. Russian nationals are the only nationals competitions more cutthroat and filled with talent than the Japanese nationals.