From an interview done in Moscow, credit to lakewood for translating: "Even I don't know. I need time to think."
Thus far, Yu-na hasn't committed to anything, not even to competitive-ness next year. Korean articles are judging and thus inserting their own opinion/wishes that she will skate next year but nothing's definite as of yet. I expect Team Yu-na will have a press conference when she decides or at least release a public statement independent of an interview.
Anyways, slightly OT but from the same interview (credit to lakewood@YNKF) on the Russian babies in regards to if she wants to compete w/them: "No way. Thank God I was born early and don't have to."