v1.0.3 is the most recent stable update available as of early 2024, though some databases track specific NSP updates up to v1.0.2 for individual title IDs.
The base NSP is remarkably small (around 8 MB ) because it acts as a launcher, while the Update NSP contains the bulk of the game data, weighing in at approximately 11.88 GB to 12.4 GB . Batman- Arkham City Switch NSP UPDATE
Updating your Arkham City NSP is critical because the base "cartridge" or initial digital file often lacks the full game data or necessary stability patches. Batman: Arkham Trilogy - FAQ - DC Games Support Batman- Arkham City Switch NSP UPDATE