The episode ends with Batman joining J'onn on the Watchtower space station, where he meets other heroes: Green Lantern, The Flash, Hawkman, and Green Arrow .

Batman and J'onn attempt to infiltrate Wayne Industries to use its satellites to disrupt the Joining's signal.

Upon arriving at the Watchtower, Batman reveals he had already hacked the League’s systems months prior as a "precaution". If you'd like, I can: Detail the Justice League's powers shown in the show. Compare this version of the Justice League to other series. Provide a summary of the Season 5 follow-up , "Lost Heroes." Which of these The Joining, Part 2 | The Batman (2004) Wiki | Fandom

The sound of the Joining's weaponry is an homage to the 1953 film War of the Worlds .