User blog comment:IamJakuhoRaikoben/Chapter 448: Fight the Power, Review./@comment-5303512-20150817131115/@comment-24264679-20150817153601

I am pretty sure she was referring to not losing anyone because of her previous fight during the tartarous arc in which she lost Aquarius. Natsu in that arc lost Igneel, Gray Silver and Laxus+Rijinshuu almost died.

People took it as she was narrating from the future but giving how it was worded I seriously doubt it. She wasn't sure about about the outcome of the battle.