Well, I certainly don't want to argue with the author herself. But while I've already admitted that I missed that Dr. Polaris said "nearly," I must have also missed where Aura was using her magnetic powers at the end. Dr. Polaris and Superman defeat Repulse, then Black Adam and Reverse-Flash show up to get Polaris out of there. Black Adam helps Superman prevent the bridge from collapsing. Then Superman and Lois spend time together in China. Where is Aura shown using her powers?
Of course, you are right that I forgot one of the key rules of superhero comics: no corpse, no death. Anyway, thanks for responding to this. I hope you weren't offended by my bringing this up. As I said, I didn't bring this up to attack you at all.