All I've heard is speculation, no actual rumors or decent sources. And speculation says January. It does make sense. Halloween and Christmas are very busy seasons, and they don't have a need for any influx of cash, because the parks will be full regardless of MK sales or not. So when things quiet down a bit in January, they could put MKs back out and spark traffic.
Also, renewals started in August, so that will be 4+ months that they have to see how many are renewing and how many are lapsing on average.
Like you, I was hoping for sooner, but if it happens in January... well... happy birthday to me!