A-dev, there's actually really great comic books that depict things like the future war (with T1/T2 John Connor fighting the war, Skynet's defeat, having to send Reese and Uncle Bob back in time etc. etc.) and little loose ends like the T-800 arm being found smashed in the gears along with other evidence.
The Future war stuff was taken directly from the T2 scripts and added upon. When they go to get Uncle Bob after they've sent Reese back in time, they're in the cold storage room and some of the T-800 come alive and take out some of John's men. That'd be a really scary scene on film.
I've never seen this stuff truth be told. I'd love to.