Will the President of the U.S. and the President’s family suddenly disappear along with other key world leaders, and be described as fleeing Reptilians, as a way to greatly ramp up fear and dupe the public about need for help from the presumed benevolent Arcturian extraterrestrials?

This may well happen, depending on who the president happens to be. As you know, some are replaced by Reptilians, some are not, for a variety of reasons, but it is in the planning to have a president in place who has been replaced, with that being the primary objective so they can simply leave and be done play-acting personally, but leave a large hole to be filled with fear and uncertainty in their wake. True to form, the Disclosure Movement will rely on the manipulation of humans themselves to do most of the work. A little bit of manipulation and psychological warfare can go a long, long way to influence the public. As always, the media can be counted on to carry water for the extraterrestrial agenda because they have been doing it during their entire existence, as a source of information.