They should all be destroyed!
I tend to forget that. I wish they filmed the time travel scenes, but it's not really necessary when I think about it.Intro of T2 is the only time we see endos during Future War canonically. And that scene was Skynet's last stand against winning humans, the only time it had to use infiltrators as soldiers.
This game looks and sounds like just another horrible setup for another horrible Terminator-related media. And considering the developer, it's gonna be a shooting gallery and nothing more.