The Watchtower is the main headquarters of the Justice League. The Watchtower is constructed of promethium and uses highly advanced Martian, Thanagarian, Kryptonian, New Genesis, and Earth technology. It is a Stage in Injustice: Gods Among Us.
- On the left side of the stage, a Switch can be used to activate the aircraft nearby to damage the opponent.
- Mid screen of the stage, a large orange globe can be found. Here, the opponent can be kicked into the Console just below the globe, and can open up for additional combos.
- On the right side of the stage, a Smaller Globe can be found and can be thrown by Power Characters, or exploded by Gadget Characters. Also, on the very corner, a Console can be found and exploded by Gadget Characters, or can be used to slam the opponent into it with Power Characters.
- A Mobile Sentry Bot can be found hovering in various areas of the stage and thrown at the opponent.
- On the left side of the stage, a Pipe and Lever can be found. Power Characters can pick up the pipe and slam it onto the opponent, Gadget Characters can activate the lever, sending fire, damaging the opponent.
- Mid screen in the stage, a Console can be found just next to Mister Terrific. Here, the opponent can be kicked into the console, opening up for additional combos.
- On the right side of the stage, a Laser Cannon can be found. Gadget Characters can target it at the opponent, Power Characters, can throw it at the opponent.
- On the stage, another Mobile Sentry Bot can be found and thrown at the opponent.
- On the left side of The Bridge, you can perform a stage transition that will send the opponent through a series of spaceships. The opponent will then fall to a giant fan where one of the ships will crash onto the opponent, sending them down below into the Reactor.
- On the right side of The Reactor, you can perform a stage transition that will send the opponent crashing through the Watchtower into space. A ship will fly by, crashing into the opponent where they are led back into The Bridge.
- The Martian Manhunter can be seen seen on the right side of the Bridge if he is not part of the fight.
- Mister Terrific can be seen in the background of the Reactor.
- Even though the stage is set in space, characters with super moves which involve the Earth in some way still show them being on Earth.
- In the ninth chapter of the Year Two comic series, the Watchtower fires an orbital weapon similar to the Binary Fusion Generator from the Justice League Unlimited cartoon series.