The ending of the original film. Yes, Bennell did finally succeed in getting the word out, but can the fighters stay awake for long enough to oust the invaders? Will they start hallucinating or die from sleep loss?
The original ending, where Bennell is simply and frantically screaming at passersby, for all the world appearing insane. Worse, we know that the nice people who'll come for him are calm, logical, and collected, so he'll inevitably get entrusted to their care.
While it's never implied (the ending WAS placed as a happier alternative), it's not impossible that the people listening to the story and ordering a retaliatory strike (or someone within their ranks) are pods themselves. Maybe Miles' claims fell on deaf ears and he was merely made to relax just so he could let his guard down and succumb.
