We’re not even halfway through summer, but that hasn’t stopped Universal from hyping its upcoming Halloween Horror Nights’ haunted houses. But given that the theme parks’ annual fright-fest begins in August, it’s never too early to start planning for spooky season For the uninitiated, the yearly ticketed event typically includes 10 houses, with half of them based on popular horror properties. But these walkthrough experiences are a far cry (or bloodcurdling scream) from your local corn mazes and haunted hay rides. Hollywood-quality productions packed with immersion-ratcheting special effects, talented live performers, and rich storytelling, these elaborate houses rival permanent attractions. Halloween Horror…