I've read that they said that they would take at least a year off after this season, but I haven't found an article that definitively says they wouldn't consider a comeback. I imagine they might want to preserve their bodies by not competing and just coaching and doing shows. If they find they still have the skills and desire to compete, they would re-evaluate.
G&G and M&D both re-instated quite successfully for the 94 Olympics; so, it wouldn't be unheard of.