The original video showed the Slinky float at the intersection of Harbor and Ball.
Unless the parade storage facility is somewhere other than where I believe it to be (DL backstage; I confess that I don't really know where DCA parades are stored), that would seemingly point to a relatively imminent rollout.
I don't know it to be true, but what Touchdown is speculating makes a lot of sense to me. If Fantasmic and/or fireworks are going to be affected immediately after the end of Christmas as he premised, that would allow TDA to present something in the meantime, bring people in during a slow period, and potentially allow them time to troubleshoot PTN issues when they can better channel their focus, given that other entertainment offerings would be down at that time.