In order to start next mission you have to find way to call the chopper. First move Batman to the local terminal and use it do build platform with suit with sensors. Use it to scan the green wall and move red levers inside (picture).
Next use bricks to build platform with acrobatic suit for Robin. Take it, transform into the ball and move on the platform on the right (picture). Start running and do it until you destroy the container.
Use new bricks to build terminal (picture) and use it to call the chopper. At the end get inside vehicle.