Factual error: During the opening narration Kyle Reese states that Skynet attacks humanity on August 12, 1997. In the shot of missiles decimating San Francisco, multiple 2005-present Toyota Priuses, Dodge Chargers and other late model cars are seen.
Continuity mistake: John has the scars on his face from Terminator Salvation events indicating that it's the same and original timeline, and also Skynet was going to send the T-800 to 1984, but the original T-800 is sent once again in Genisys.
Suggested correction: Terminator Salvation and Terminator Genisys are not in the same continuity. The scars on John Connor's face have been a recurring feature since he was shown in Terminator 2 (played by Michael Edwards). Both Salvation and Genisys were referencing this original design of the character.
Suggested correction: That 1997 was from another timeline before the events in Terminator 2 altered history. It's possible those models may have existed earlier in that timeline than in our world.
This is assuming too much about the alternate timelines. There would have to be more concrete evidence that such things would be altered in said timelines. Also, considering that timeline is supposed to be what took place from Terminator 1 in its own separate timeline, we would go still by our own following the events of it leading up.
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