While not quite as surefooted as previous cinematic LEGO outings, this family-friendly romp still offers a colourful dose of inspired lunacy. From the outset, it is important to acknowledge that the Ninjago franchise, albeit hugely popular in its minifigure form, is not as appealing as the Batman universe, yet that in itself liberates the filmmakers to try something a little different. At no point does this addition to the LEGO roster claim to be as subversive or slyly satirical as this year’s hilarious puncturing of the Bruce Wayne mythos nor as a piece of animation does it set out to…