To start this mission you have to follow the Joker's vehicle (picture).
After a short animation the chase will begin. You task is to destroy vehicle's weapons (picture) using machineguns. Later you will also have to destroy enemy choppers.
After the chase you will start next section inside the vehicle. Eliminate all enemies and destroy green boxes in top right corner. Use bricks to build platform with magnetic suit for Robin. Then use magnesium on the blue bricks on the right (it will fall out the ball) and use magnesium once again to drag ball to the hole on the left (picture).
When the magnetic wall shows up climb onto it on the higher floor and turn the valve. After that move right, use magnesium on the blue brick under the ceiling, destroy green crates and build a platform with sensor suit for Batman. Activate invisibility, move left and go to the roof using green ladder (picture).
Throw Batarang at violet circle (picture) which will deactivate the camera. Use Robin's magnesium on the blue brick on the right, move right and destroy two violet pipes near the edge. When the green wall shows up use Batman's power to shift gears and activate the machine.
Move right. After a while you will be attacked by flying enemies (picture). Take them down using Batarang and build platform with bat suit.
Move forward and use magnesium on the blue brick to lift a ramp. Stand on the edge of it, fly above the electric copula (picture) and destroy the violet wheels.
Move forward and use Batman's pistol on the green machine (picture). Use magnesium to destroy aerial, build a terminal and use it to call a plane. After a short while jump into the vehicle and use magnesium on the entrance door.
In the room with three electric streams eliminate all enemies and quickly destroy green pipes near chambers. After that pull down the lever on the left (picture) and destroy mechanism which will show.
Then move to the higher floor using blue pipes, use magnesium on the local door (picture) and destroy the mechanism. Use bricks to build handle for Batman.
Move to the right edge of the platform and shoot hook at the handle at the top of the electric stream (picture). Fly to the opposite platform, use pistol to destroy blue wall and destroy third mechanism.