Thanks to some fancy Space Suit flying, Batman has managed to infiltrate the Watchtower. Now you just need to open the hangar door so that the rest of the Justice League can land! Go left and use Cyborg’s Magnet Suit to pull down a large object. This exposes a gold wall. Use Cyborg’s laser to cut out a bat-symbol, then build the bricks that tumble out into a fueling station for Batman and Cyborg’s Space Suits.
Fuel up Cyborg’s Space Suit and then fly up to the platform above you. Switch back to the Magnet Suit and open a magnetic door up here to access a button. Move Cyborg onto the button to expose a gold power cell below you. Tag to Batman and use his Space Suit’s laser to overheat the gold power cell from below.
The hangar door won’t open—there must be another power cell! Tag to Cyborg, put on his Space Suit and then fly to the right. Land and use his magnet suit to raise a spinner up from the floor over here. Push the spinner’s green side to extend some stairs for Batman and The Flash.
Use Batman’s Power Suit or Cyborg’s Demolition Suit to destroy the silver objects near the spinner with explosive attacks, then build their bricks into a treadmill. Tag to The Flash and jump on the treadmill, then tap the Attack button to run faster and faster. Keep running until you overcharge and blow the hangar door’s other power cell. With both cells destroyed, the hangar door opens, letting the rest of the Justice League land!