So They called him and said "Congratulations, you are officially a member of League of Justice" and He said " Thanks a lot you won't regret it". While his brother Jake was Thinking about destroying the League of Justice and had a plan he said "What if I join Injustice(IS) to destroy the LoJ" so he commenced with his plan and he thought "But how do I get their attention" so he made a pretend kidnapping scheme to get the attention of IS and It worked. They later went to recruit and It was successful but he said " I'm not in for destruction I'm in for revenge".
So as things were going well for one twin it was same for the other. Oneday both of the brothers tried calling each other simultaneous but they both heard "number busy" and Jack thought Jake had blacklisted him and so did Jake.