Objective 1: Bring Down the Gate
With the force field blocking your path to the left and a large gate to your right, you have to find an alternative path. Start out by having Martian Manhunter use Detective Mode to investigate the area near the purple boulder on the right. Your efforts cause a phase point to appear. Before you go to pass through it, be sure to smash The Joker prop in the corner to the north of the phase point.
The Joker Smash Challenge: 1 / 3
Pass through the phase point to appear inside of the force field. Those guards aren’t too happy that you thwarted their defenses, so deal with them swiftly. Start smashing the four force field generators to bring down the wall of energy and allow your friends to join you.
Also, don’t forget to smash The Joker prop on the left side of the platform!
The Joker Smash Challenge: 2 / 3
With the force field down, have Cyborg give the hyper strength handles against the back wall a pull. This causes some LEGO bricks to spill onto the ground. Build the bricks into a speed spot. Have The Flash run on the speed spot to aim the energy beam on the statue to open your path ahead.
Objective 2: Make Your Exit
Head east and fight the small batch of guards. Climb the newly opened stairs to reach another platform. Keep heading east and a massive beast appears, using its energy beam to bring a spacecraft to the ground. The poor pilot seems confused as to what just happened!
A force field has gone up around the hapless traveler. Use mind control and have him smash the force field generator to allow our heroes to access the electrical terminal. Equip Cyborg with the Electric Suit and discharge the electrical terminal. Don’t forget to smash The Joker prop nearby as well.
The Joker Smash Challenge: 3 / 3
Head west again and smash a rock against the back wall to reveal an updraft. Jump into the jet of air to ascend to a small ledge above. Charge the inactive terminal that is on the ledge to open the path leading north. Follow the newly opened path to end the level.