Originally posted by KingD19
Expanding on Robs point. MCU Eternals seem to be extremely advanced synthoids/AI constructs similar to, but much more advanced than Vision, shown when I believe Ajak was shown getting a power core inserted into her chest and then "activating" for the first time. So their prime directive was probably "Only protect humanity from Deviants".
Not sure if they're pure synthetic like Vision. But genetically engineered beings enhanced with technology. Maybe you're right though, did the trailer mention that none of them died in the snap?
Either way, there's going to be some "finding our humanity" angle to the plot. Which is a common theme in scifi.