Okay, here's a random idea for an Alien movie. So, IMO, part of the problem with most of the Alien movies is that they focus on being about the xenomorph, and how cosmic and invincible they are, etc etc. Which misses the point, the xenomorph are dangerous, but they are dangerous in the way that an unknown animal ( or maybe something-more-than-animal ) is. The real reason there is an actual threat, is almost always because of human incompetence or greed. The theme of Alien is "Unprepared people exposed to alien danger due to human vice".
So, lets take that and run with it a tad. It is the future, further future than Aliens, far enough that after a couple incidents like the total loss of the Hadley's Hope colony, the xenomorph is now a known hazard at least broadly. Properly trained spacers are aware that eggs and facehuggers are a thing that exists, procedures and equipment exist to contain and kill xenomorph if necessary, and there are even proper emergency measures to save the lives of those infested, if done in proper time. Which is where we first arrive, with the doctor working at a mining operation ( or something similar ), who just had the one thing every medical professional hopes they never see land on their sickbed- a worker wearing a facehugger. The latest operation burst through into a cave chamber filled with eggs, things went down hill from there.
In theory, this is a bad situation, but one that should be perfectly manageable. They caught this situation early, so there is only one facehugger victim. The outpost should just scan, verify, and destroy via explosives the egg chamber, do sterilization sweeps in its vicinity, all while the the facehugger victim receives medical treatment to remove the hugger and kill the implanted embryo. In theory. The problem is three-fold. One, the outpost command is slow and sloppy about instituting containment protocols, out of poor emergency training, a desire to avoid the bureaucratic disruptions of a declared Xenomorph Encounter Incident on their operations bottom line, or both. Two, due to said sloppy protocols, iffy morale, and good old human fear, there are a lot of personnel who near panic, and at any moment there might be an outbreak of paranoid violence. Three, and most importantly for said doctor? It turns out those "emergency medical supplies" that are *supposed* to be there for dealing easily with xenomorph outbreaks? Are incomplete, absent, or old and non-functional, maybe due to penny pinching at the outpost, or maybe just someone screwed up elsewhere and no one noticed until an actual emergency happened.
Thus, the doctor ( who is the main hero of the story ) is on the clock, trying to acquire and improvise the necessary supplies to save one person's life, against a backdrop of forces standing in the way. Can they get the necessary tools and medicine to do their job before the embryo matures? Will they even get the chance, when either outpost management or vigilante mobs or both might decide its more critical to just kill the dude? And what if, amidst general screwups and ordinary incompetence, there are one or more people hiding a more sinister agenda?
( Writer's Notes: No, it wouldn't be all about "Get a sample for research". That has already been done way too many times. Ex cathedra, anyone out there who actually wanted xenomorph samples for research purposes already got them decades ago, its moot. Some possible sinister agendas I would instead consider include "Somebody in management wants to blow up the operation for insurance purposes", "Somebody in personnel wants to use the emergency to either force government/regulatory attention or foment a revolt against management", or "Its purely personal, baby, no big goal, just a chance to ruin and murder some specific person they hate". Also, while you can dial the actual outcome for the outpost to various settings on the cynicism meter, I would *strongly* insist that the doctor actually *succeed* in saving the life of their patient. Even if the whole outpost burns, they do achieve that victory. )
And I'm fine with that.
