I still maintain that the best thing for this movie would be for the Predator to survive.
In every single movie weve had so far, the "main" Pred got nuked at the end. Six (!) movies in a row doing that.
I think after six movies ending with a dead Pred, this would be the breath of fresh air the franchise needs. No new sub-species or upgrades or whatever, just let the Pred live for a change. That would different enough from any of the others.
You dont even need to kill the main character to make it work. Let their fight end with a draw, or with her gaining the Preds respect, or something else along those lines.