The first Lego movie was a delicious, inventive surprise, a toy spin-off packed with irreverent humour that culminated in a bold narrative twist. This sequel, which offers supporting character Lego Batman (voiced by Will Arnett) a standalone vehicle, is far more straightforward in its approach. That’s not to say that it isn’t funny. It is sporadically hilarious, particularly if you have a weakness for gags that involve substituting “bat” with “butt” and knowing nods to other TV and film characters. Everyone from the Daleks to Godzilla get cameos. The dysfunctional bromance between Batman and the Joker brings a sly irony to a rattling, cacophonous kids’ film that has an eye firmly fixed on the fanboy market.