LEGO Batman Mayhem Collection DLC Trailer Shows Joker and Harley Quinn Story
The Mayhem Collection DLC for LEGO Batman: Legacy of the Dark Knight adds a story mission with Harley Quinn and the Joker, a Mayhem Mode, and a Sinister Pack with themed outfits. It launches September 18, 2026, for Deluxe Edition owners and coincides with the Nintendo Switch 2 release.
The Mayhem Collection arrives on September 18, 2026, the same day the base game debuts on Nintendo Switch 2, making it a launch-window incentive for new console owners. Deluxe Edition holders receive the content at no extra charge, while a separate free update introduces the "Absolute" difficulty tier for every player, demanding sharper combat precision.
The DLC's story mission reimagines Arkham Asylum as a chaotic farewell party, with Harley wielding her hammer and a confetti-and-bubblegum Fun Gun alongside her hyenas, Bud and Lou. The Joker favors a speedy, agile fighting style with a Paintball Pelter and Boxing Glove. Mayhem Mode adds timed runs across Gotham, pursued by Batman and Robin while facing Task Force X members like Deathstroke and King Shark. The Sinister Pack pulls outfits from comics and animated series, including The Batman Who Laughs and multiple Joker variants.
This DLC could deepen engagement for existing players while giving Switch 2 buyers a compelling reason to choose the Deluxe Edition at launch. The nostalgic outfits and villain-focused gameplay may broaden appeal beyond core LEGO fans to longtime Batman enthusiasts. The free difficulty update could also extend the game's lifespan, potentially sustaining community discussion and streaming interest well past the initial release window.