[s5e13] Lost Heroes: Part Two -

The episode marks the definitive formation of the League. Superman acknowledges that the gods and titans of the team could not have won without the strategic leadership of the non-powered heroes.

The Season 5 finale of The Batman (2004), titled serves as the series’ grand conclusion, transitioning the narrative from a solo Batman story into the broader dawn of the Justice League. The episode focuses on the "non-powered" heroes—Batman and Green Arrow—leading a de-powered League against an invasion by the Joining. Plot Overview and Resolution [S5E13] Lost Heroes: Part Two

Following the abduction of the Justice League’s most powerful members, the alien collective known as "The Joining" transfers their abilities into advanced android counterparts. The episode marks the definitive formation of the League