It does, in a way, give the ending away but that does make me happy as I was wishing that epic battle would be in the film. The rest is still similar to the original plot but with enough in it to make it different enough for fans to enjoy & spot the new bits of the plot vs the classic scenes. Most of them actually being in the below trailer.
In the near future, Major is the first of her kind: A human saved from a terrible crash, who is cyber-enhanced to be a perfect soldier devoted to stopping the world’s most dangerous criminals. When terrorism reaches a new level that includes the ability to hack into people’s minds and control them, Major is uniquely qualified to stop it. As she prepares to face a new enemy, Major discovers that she has been lied to: her life was not saved, it was stolen. She will stop at nothing to recover her past, find out who did this to her and stop them before they do it to others.
BILL / TED: "Excellent!" from BILL AND TED'S EXCELLENT ADVENTURE