The Watchtower was the Justice League's space base, but unfortunately, it had long since fallen under Alfred and the modified machine Batman's control. The pillar of light they had seen from the ground earlier was actually a portal leading to the Watchtower, guarded by a mechanical army.
"I suggest we fly straight up," Clark said. "Since Batman has already taken control of the portal, even if we use it, he might redirect it and throw us somewhere else."
"No, we have to go to the portal," Iron Man said. "Obviously, he built a robot factory in that base above us. The robot army is being produced there, and the portal is the gateway through which they descend to Earth."
"Destroying the resistance forces and the factory on the base is the ultimate objective, but first we have to cut off his army's transport route. Otherwise, before long, the entire Earth will be overrun by the evil robot army, and every city will be destroyed."
Clark asked inwardly, "Is that true? Do you think Batman... I mean, maybe... he might not necessarily..."
"You already know the answer," Ultron said flatly. "If the one who invaded the base and controlled him wasn't Alfred, do you think he would still be Batman now?"
Clark took a deep breath. "All right. We can't let this continue. He used to save the world. Now I have to save him and this world."
The group then set off toward the portal on the ground. Clark explained, "During the construction of the Watchtower, we selected locations for ground portals. Hidden teleportation points were planted in dozens of cities around the world, in case one city fell and our transportation routes were cut off."
"There are three portals in Gotham. Two are on the surface, and one is