It looks really dumb, and nothing makes sense about it.
- John Connor was the "only hope for mankind", now all of a sudden she is? Where the fuck is John Connor? - Dark Fate is ignoring all the other Terminator movies, so it takes place after T2. So there's no reason John Connor shouldn't be in it. If he's dead or something, then the first two movies don't even matter anymore, which means Sarah Connor shouldn't be in it. - Arnold made Sarah terminate him in T2. So he shouldn't be in this one. - The liquid metal terminator was the most badass terminator, since no weapon could destroy him. The only reason he was destroyed in T2 was because he fucking lost his balance and fell, which was really dumb and anti-climactic. It just makes you go "Really? THIS is how it's defeated? LMAO!" That said, it would be dumb for Skynet to revert back to mechanical terminators. But I guess it's to be expected, since you can't make a more badass terminator than an invincible one.
For what its worth they supposedly have a good explanation for why Arnold is there and why he aged. ---