Is an “Independence Day” invasion of Earth by half crazed Anunnaki a possibility? What are the chances and what likely timeframe?

We cannot speculate on such an eventuality. We do not wish to add fear. There is always the possibility of a mass invasion force, but it will more likely be taking over from within, and that is the current plan. The probability at the present is that humanity will hand over the keys to the kingdom willingly through manipulation and mind control subjugation, with a dash of fear thrown in as an incentive, and that will be all that is needed.