Description
After the Cybertronian Civil War, when the Decepticons lost and declared for a peace, Megatron was asked to leave Cybertron, which he did, honoring the wishes of the people. He traveled to galaxy, learning about all the damages HIS war caused in the name for a twisted version of Justice. Eventually he settled down on a liminal populated planet, lending aid when asked, and coming to peace with the nature around him. Eventually, he began to practice old Cybertronian spiritual practices to get in touch with his inner being.
It was him doing this that eventually brought the attention of the Blue Lanterns, or at least a Blue Lantern Ring. It decided to test Megatron, doing the classic Blue Lantern test. And surprisingly, Megatron stayed vigilant. So he was allowed to become a Blue Lantern.
Now helped spread hope and helps out the Green Lanterns, being the heavy hitting knowledgeable team member. He even returned to Cybertron to help recruit some Green Lanterns.