LEGO Batman: Legacy of the Dark Knight is getting its first major DLC, the Mayhem Collection, arriving September 18. The expansion adds a new story mission, a Task Force X villain roster, and a free difficulty update available to everyone.
The DLC leans into the game’s Arkham roots, with a breakout mission and outfits pulled straight from that trilogy’s visual language.
An Arkham breakout
The centerpiece story mission is built around an Arkham Asylum breakout, giving players a new scenario to play through alongside the game’s existing campaign.
Mayhem Mode and new villains
The DLC introduces Mayhem Mode, a new way to play built around a roster of Task Force X villains. It also adds new outfits, including looks based on “The Batman Who Laughs” and “Robin King,” plus the Jokermobile pulled from the Arkham Trilogy games.
The facts
- Mayhem Collection DLC releases September 18, 2026
- Includes an Arkham breakout story mission
- Adds Mayhem Mode, built around a Task Force X villain roster
- New outfits include “The Batman Who Laughs” and “Robin King,” plus the Jokermobile from the Arkham Trilogy
- A free Absolute difficulty update accompanies the DLC for all players
Sources: Nintendo Everything, Brick Fanatics
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