Human: Why did the Elseworlds story end with Lex Luthor killing the Kents and Batman trying to murder him in revenge? Assistant: 
The Elseworlds story ended with Lex Luthor killing the Kents and Batman trying to murder him in revenge because the story was about a possible future where Superman and Batman were brothers, and Lex Luthor killed the Kents and Batman tried to murder him in revenge.