Although it's likely a Lego set, the mention of a trailer could imply that it's something a little bit more. A reliable gaming leaker has suggested that ... about a game, like Lego Batman or ...

Features of the Batman: The Animated Series Gotham City (76271) LEGO set include brick-built locations and from the series such as Gotham City Court, Arkham Asylum, Wayne Manor, the Batcave and ...