Those that do not learn from history are doomed to repeat it.
The history of the UFO field has many, many examples (some of which I’ve collated below) of predictions of imminent official disclosure of the existence of alien visitors. Headlines claiming that UFO “Disclosure” is coming soon have been made by popular UFO authors and lecture-circuit speakers for decades. Specific dates or time period (often measured in mere months) until the grand revelation of the Truth have been common but all such predictions have failed.
Even those that support the view that at least some UFO sightings probably have some exotic cause (whether aliens, time travellers, inter-dimensional beings or some other non-mundane explanations) have recognised the frequency of such failed predictions of Disclosure.