Board Thread:Theories/@comment-28194879-20160412194627/@comment-25322628-20161109023819

It was first heard in an older cartoon series that had two characters related to each other, both were bad guys with powers as a result of mutagenic gas, but the younger brother changed his way and turned to the good side, something the elder brother didn't accept and wanted him to come back, even if it meant making him look like he had gone bad again. In the end of the episode, good brother stays good and bad brother gets away, but the two never spoke or saw each other again for the remainder of the series.