Watching the trailer for Lars von Trier’s latest film, Melancholia, it’s difficult to know what to expect. But then, that’s probably the point. The director delights in misleading and shocking audiences, so what looks like a family drama derailed by the impending apocalypse could turn out to be, well, anything really. At least it won’t be predictable. Charlotte Gainsbourg, who starred in his 2009 film Antichrist is back alongside Kirsten Dunst, Keifer Sutherland and Charlotte Rampling.