Gotham’s about to get a lot louder. Warner Bros. Games has dropped a fresh trailer for LEGO Batman: Legacy of the Dark Knight, revealing the Mayhem Collection DLC — and this time, it’s The Joker and Harley Quinn stealing the spotlight as fully playable characters.

What’s Inside the Mayhem Collection

The Joker brings a quick, mobility-focused fighting style armed with his Paintball Pelter and Boxing Glove, while Harley Quinn goes full chaos mode with her hammer, a Fun Gun loaded with confetti and bubblegum, and her hyenas Bud & Lou fighting by her side. Together they headline a new story mission built around a wild Arkham Asylum breakout, plus a brand-new time-limited Mayhem Mode where players smash through Gotham while dodging Batman, Robin, and members of Task Force X — think Deadshot, Killer Croc, and Captain Boomerang.

LEGO: Overview

Detail	Information
DLC name	Mayhem Collection
Release date	September 18
Platforms	PS5, Xbox Series X/S, PC, Nintendo Switch 2 (Deluxe Edition)
New playable characters	The Joker, Harley Quinn
New content	Story mission, Mayhem Mode, Sinister Pack (outfits, Jokermobile, Batcave items)
Free update	New “Absolute” difficulty for all players
Switch 2 version	Launches Sept. 18 alongside the DLC; pre-orders open now

A Free Difficulty Boost for Everyone

Even players skipping the DLC get something on September 18 — a new “Absolute” difficulty setting, pitched as tougher than the existing Caped Crusader and Dark Knight modes and demanding sharper combat precision. It’s a solid nod to fans who’ve already cleared the main story and want a real challenge.

The Sinister Pack rounds things out with Joker-themed skins for the whole Bat-family — including a Batman Who Laughs outfit and a Jokerized Catwoman look — alongside the Jokermobile and new Batcave decor. For Switch 2 owners, this also marks the console debut of the full game, launching Standard and Deluxe Editions the same day as the DLC.

Whether you’re diving in for the Joker and Harley storyline or just chasing a harder combat mode, September 18 is shaping up to be a big day for LEGO Batman fans across every platform.

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