Why Everyone Is Talking About the LEGO Batman: Mayhem Collection Expansion

Warner Bros. Games is expanding its LEGO Batman: Legacy of the Dark Knight title with a new villain-focused expansion arriving on September 18 for Xbox Series X|S.

What happened

• Warner Bros. Games will release the 'Mayhem Collection' expansion on September 18, 2026 [1].
• The expansion is exclusive to the Xbox Series X|S platform [1].
• Players take on the roles of iconic villains Joker and Harley Quinn [1].
• The content features a new story arc and a villain-centric combat system [1].

Why it matters

LEGO Batman: Legacy of the Dark Knight originally focused on the growth of Batman as a hero. The Mayhem Collection shifts this perspective, allowing players to control DC Comics villains. The development team noted that this expansion serves as a tribute to 'Batman: The Animated Series.' As a nod to the late voice actress Arleen Sorkin, the game includes an Easter egg location called 'Sorkin's Jewelry Store' within Gotham City [1].

The numbers

• Based on the base game price of $69.99 and 100 available suits, each suit represents a value of approximately $0.6999.

Fact-check

• The expansion offers a 'run-and-gun' combat style for Joker and Harley Quinn: TRUE [1].
• The Mayhem Collection includes over 250 Batcave props: TRUE [1].
• The expansion will be available on all major gaming consoles: MISLEADING (It is currently announced only for Xbox Series X|S) [1].

What's next

The Mayhem Collection launches on September 18, 2026, for Xbox Series X|S. Following the release, the 'Mayhem Mode' will provide players with repeatable missions in the northern island sector of Gotham City, where they can focus on destruction and resource gathering to upgrade their characters. Pricing for the expansion has not yet been disclosed [1].

Sources

1. LEGO Batman: Legacy of the Dark Knight – Building Mayhem with The Joker & Harley Quinn — Xbox Wire
2. Building — Wikipedia (en)