In 1996, Warner Brothers opened the Summer movie season with Twister, then the landmark disaster movie with groundbreaking visual effects. This summer, WB brings us Into the Storm, a new level of tornado storm chases in August. The stars and filmmakers were at WonderCon in Annaheim to tell us about the new storms coming our way. “The final sequence where the storm collects into a megastorm,” Richard Armitage said.