Slavoj Žižek will give a talk at Meltdown Festival hosted by M.I.A. along with WikiLeaks founder Julian Assange who would be speaking remotely over a live link. The discussion, titled “What’s Coming Next,” will “cover the complexities of global activism and art in a changing world.” From 10:30 to 11:45 a.m. on June 11 at the Weston Roof Pavilion of the Royal Festival Hall in the Southbank Centre.