LEGO Batman: Legacy of the Dark Knight arrives on Nintendo Switch 2 on September 18, 2026, but the date brings together two different developments. The first is the debut of the game's Nintendo console version. The second is the release of the Mayhem Collection, additional content that also becomes available the same day for PlayStation 5, Xbox Series X|S and PC.
This distinction matters because the game was already available on the other platforms before Sept. 18. On Switch 2, the date therefore marks the arrival of the base game and, for players with access to Deluxe content, immediate availability of the Mayhem Collection as well. Warner Bros. Games confirms this schedule in its official announcement for the Switch 2 version.
Switch 2 vs. other platforms: what happens on Sept. 18
| Platform | Status on Sept. 18, 2026 | Mayhem Collection |
|---|---|---|
| Nintendo Switch 2 | The game version launches worldwide on Sept. 18 | Available the same day for players with access to Deluxe content |
| PlayStation 5 | The base game was already available | Releases Sept. 18 for Deluxe Edition owners or owners of the corresponding upgrade |
| Xbox Series X|S | The base game was already available | Releases Sept. 18 for Deluxe Edition owners or owners of the corresponding upgrade |
| PC via Steam and Epic Games Store | The base game was already available | Releases Sept. 18 for Deluxe Edition owners or owners of the corresponding upgrade |
In practical terms, the calendar change specific to Switch 2 is the debut of the platform version itself. The Mayhem Collection is not exclusive to Nintendo's console. It is a multiplatform DLC launching on September 18.
What is the Mayhem Collection?
The Mayhem Collection is DLC separate from the base game. On Switch 2, it arrives on the same day as the console version, but it remains additional content. The official WB Games FAQ and the game's website detail three main parts:
- New story mission: The Joker and Harley Quinn appear as playable characters in an Arkham Asylum breakout that brings chaos to the streets of Gotham City.
- Mayhem Mode: an additional mode centered on the two villains, with their own abilities, gadgets and takedowns.
- Sinister Pack: seven new suits, one for each original playable character, five Batcave customization items and one new Batmobile.
The official game page also makes clear that the Mayhem Collection requires the base game. It is included in the Deluxe Edition and can also be obtained through the Deluxe Edition Upgrade for Standard Edition owners.
Standard Edition and Deluxe Edition are not the same
Buying only the Standard Edition gives players the base game. The Deluxe Edition adds extra content collections, including the Legacy Collection and the Mayhem Collection. That is why the statement "the DLC launches alongside the game on Switch 2" needs context: it launches on the same day, but it does not automatically become part of every Standard copy.
According to Warner Bros. Games, Standard Edition owners can buy the Deluxe Edition Upgrade. That upgrade includes the Legacy Collection and the Mayhem Collection. The base game requirement is also stated on Nintendo's official Switch 2 upgrade page.
What the Switch 2 version confirms
Nintendo's official page lists the Switch 2 version for Sept. 18, 2026 and states support for handheld, tabletop and TV modes. The listing also indicates HDR on compatible TVs and an approximate 23 GB download size. These details describe features and ways to use the version, not a direct performance comparison with PS5, Xbox Series X|S or PC.
The safest editorial conclusion is straightforward: the version brings the game into the Switch 2 ecosystem and lets players use the console's own play formats. The official materials used for this article do not provide, in the launch announcement, a complete technical comparison of resolution, frame rate or visual quality across every platform. There is therefore no basis here for claiming that one edition runs better or worse than another.
What changes for players who already own the game elsewhere
For players who already own the game on PS5, Xbox Series X|S or PC, Sept. 18 is not a new base-game launch. The relevant change is the arrival of the Mayhem Collection for users with the Deluxe Edition or the corresponding upgrade.
For players who specifically waited for the Nintendo Switch 2 version, the situation is different: the base game debuts on Sept. 18 and the Mayhem content is already available on the same calendar for those choosing the Deluxe experience. This reduces the content gap on day one of the Switch 2 version.
Practical summary for September 18
- Switch 2: LEGO Batman: Legacy of the Dark Knight launches worldwide on Sept. 18.
- PS5, Xbox Series X|S and PC: the base game was already available before that date.
- Mayhem Collection: arrives Sept. 18 across the four platform families mentioned, tied to Deluxe content.
- DLC content: new story mission, Mayhem Mode and Sinister Pack.
- Standard Edition: should not be confused with the Deluxe Edition; Standard owners can use the Deluxe Edition Upgrade.
- Performance: the materials reviewed do not support a conclusive performance comparison between Switch 2 and the other versions.
For direct details, check the Warner Bros. Games announcement, the official WB Games FAQ, the Nintendo page for the Switch 2 version and the official game website.
