The concept of Terminator is to mix the future with the present. That mankind has selected a leader for a rebelious resistance against an Artificial Intelligence via machines that can think.
The Terminator 1984
Judgment Day 1991
Rise of the Machines 2003
Salvation 2009
Genisys 2015
Dark Fate 2019
Future
The future of the franchise is unlikely, but the series is open to further installments because of the developing artificial intelligence