In the alternate future called "the Kingdom timeline", Offspring is the son of that era's Plastic Man. Many times, he has been annoyed about never getting any respect, and his wife complained that he was to much of a jokester like his father. However, the timeline's Titans invited him to join their ranks, convincing him that they needed his optimism and silliness to make them laugh in times of crisis.
When the villainous Gog traveled from the Kingdom timeline to ours in order to kill Superman, Offspring and a number of Titans followed to oppose him. With the help of our main timeline's Superman, Batman and Wonder Woman, they succeeded.