There hasn't been any official announcement yet. Based on trip reports they have started renovating some of the rooms on the 5th floor and will be working their way down from there.
I was hoping someone would have heard a date. I requested info from David's. The woman who got back to me said she spoke with someone at DVC who told her "April". We're also looking for 1 night in December. I doubt there is any availability at this point anyway, but you never know.