BaconIsMyBFF

Question: Do they explain why the T-800 looks older? Or is it just an unavoidable plot hole you have to accept?

MikeH

Answer: The T-800 is a metal endoskeleton covered in living human tissue. That human tissue still ages the same way a normal human would. This particular T-800 has been living in the current timeline since the early 1990's so he has aged at least 30 years and originally had the appearance of a roughly 40 year old man.

BaconIsMyBFF

Question: What happened to the military guy that was injured and left in the Carl's van? Did they simply drop him off the plane along with the van?

Answer: Yes, he dies in the plane crash.

BaconIsMyBFF

Question: If Skynet was prevented from coming online, how did Legion develop the idea for creating terminators?

Darth Crucible

Answer: Skynet and Legion were both developed for identical purposes: defense network artificial intelligence. It stands to reason they would both evolve in similar ways. Since both Skynet and Legion were fighting a similar human resistance, they both developed similar infiltration units.

BaconIsMyBFF