The Watchtower

The Watchtower is an orbiting satellite constructed on Planet Earth, and launched into orbit by the Original Justice League. The Watchtower is only accessible via Zeta-Tubes, as well as Javelins going in or out of the Cargo Bay/Javelin Bay. Only League members may teleport to The Watchtower. The Watchtower has sensors, able to detect any disturbances on Planet Earth. The Watchtower does not have any weapons.

History
In 2000, the Original Justice League was established. The League constructed a large satellite that was launched into space. This was the Watchtower. After the entire League's deaths in 2016 with the exception of Batman and Wonder Woman, the Watchtower was decomissioned, and the Zeta-Beam database was erased. Batman and Wonder Woman immediately disappeared.

In 2017, a year after the disbanding of the Original Justice League, The Watchtower was discovered by Mr. Incredible in the middle of the Arizona desert. Having a full understanding of the events that had occured the past 17 years, he reconstructed The Watchtower, with the assistance of members of the Green Lantern Corps. The New Justice League was established about a month after his discovery. The Watchtower was re-launched into orbit, and a new League computer system was created, which also operated the Zeta-Tubes. During the re-construction of The Watchtower, the Leaguers operated out of The Cave.