Notably, upon learning of Brainiac's modus operandi of destroying planets by destabilizing nearby stars when he is done collecting cities and knowledge from said planets, Superman openly speculates that Brainiac destroyed Krypton, which was destroyed when its sun went nova soon after Brainiac abducted Kandor and Argo. He also asks the alien what he did to Krypton's sun. Brainiac ignores the query, neither confirming or denying his responsibility, though he does heavily imply it ("In fifty-seven minutes, my solar aggressor will reach your sun. It will flare up, and the Earth will be incinerated. Just like Krypton."). Superman still believes Brainiac had a part in Krypton's destruction after the end of this story arc.