Other than in movies, would we have any hope in such a conflict?
imho, The ONLY HOPE is and always has been ... Almighty God Yehovah.
HE is determined to demonstrate to all Creation that--apart from Him--all IS hopeless.
In terms of the oligarchy and the fallen angels pretending to be ET's . . . it is all a Kabuki dance.
Evidently some of the critters are slated to play the "good cop" role and some the "bad cop" role.
BOTH will work toward the utter tyrannical enslavement of mankind.
The Bible indicates that such overt tyrannical control far worse than Hitler will be in place about 3.5 to 7.0 years ... not counting however much time ... possibly ... leading up to that 7 years of Tribulation--including the last 3.5 of GREAT Tribulation.
God is a Great General . . . He MUST have some surprises up His very large sleeves for satan incarnate as the world ruler. imho, God is NOT about to let satan have all the fireworks and dramatic supernatural demonstrations in the closing acts of history as we've known it.
Fear is one of the evil one's main currencies, goals, strategies. Interesting, there's 365 'fear not's' in the Bible ... one for every day of the year.
The Bible says of this era that men's hearts will fail out of fear. "Trying times" doesn't begin to describe it.
I suspect the bottom line of the "ET THREAT" will be tyrannical coercion into joining, supporting, the oligarchy's world ruler ... i.e. the Anti Christ ... i.e. satan incarnate ... under threat of death for not doing so.
It is not clear whether they will appear before, during the middle or at the end of pending and planned WW3. It seems most likely that they will more overtly appear at the end of it--making the case to the global population that THEIR OVERT CONTROL of the planet is necessary to prevent mankind from totally destroying himself and the planet.
Of course, there is no hope ... apart from ... walking with God ... seeking His will ... and His help to walk in His will.
Life already shows that to the perceptive, awake, rational.