^ I would imagine that the 407 will open in a couple of weeks. Probably really late in November, or really early in December would be my guess.
There hasn't been any announcements about whether or not there will be a toll-free period yet. For Phase 1 of the project, there were toll gantries at the western portion of the project which made having a toll free period much simpler. Traffic heading east from the 407 ETR would pass under a toll gantry approaching Brock Road to terminate their trip on the ETR portion of the highway, and then would pass under another gantry to begin their trip on the provincially owned section. That isn't true for the extension beyond Harmony, as there are no gantries between Phase 1 and Phase 2A. It's probably not impossible to have a toll-free period, it just won't be as easy to do.