Objective 1: Defeat Brainiac!
At the start of the battle, take a moment to break all of the LEGO objects. You find a Joker prop to smash near Batman on the right side of the platform. Next, destroy the Joker prop to the left of Brainiac.
The Joker Smash Challenge: 2 / 3
On the left side, you find The Joker Card sitting in the open near The Flash.
The Joker Card
When you’re ready, attack Brainiac with a fierce combo to get the fight started. Keep on the offensive until his shockwave knocks you back.
Your barrage of attacks causes Brainiac to release your fellow heroes, but they are still stunned. Brainiac comes after you with his tentacles. Avoid them by watching for ripples on the ground. After you avoid a few of his attacks, he once again takes hold of the heroes.
A group of goons joins Brainiac. While you can take them down quickly, take this opportunity to complete the combat challenge for the level by countering the goons’ attacks. Defeat the goons then attack Brainiac again.
Combat Challenge: Counters
This process repeats two more times. After you dish out justice to Brainiac four times, he falls and the level ends.