What if Fake Luke is Luke's twin brother. His parents didn't have enough money to take care of both babies at the time so they gave fake Luke up. So fake Luke is after revenge becuase of what happen when he was born or maybe he was close to his cousin Bill Eckert so he blames Luke for his death. For fake Luke going after maybe Sonny had one of Fake Luke's friend or family killed so he's going after him.

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