It was known all along that the decision would be made at the organization meetings which started today (or maybe last night after sundown, upon close of Rosh Hashanah.) Mets have these organization meetings every year at season's end. The manager is routinely invited - except for this year, when Mickey was not invited. That in itself says a lot.
These meetings are wide ranging and typically cover multiple days. They may well have already decided (one way or another) and are waiting to announce until the meetings are concluded.
We'll all know soon enough.