The first trailer for Insidious: The Last Key (aka Insidious: Chapter 4) heads back into the ghostly realm known as The Further. When James Wan first arrived on the Hollywood scene via 2004's Saw, it's hard to imagine that anyone believed he would end up the titan that he currently is in the industry. Yet, that's exactly what happened. Wan directed enormously successful sequel Furious 7 in 2015, and is set to helm the DCEU's highly anticipated Aquaman solo film. He's also producing reboots of Mortal Kombat and Resident Evil.

Still, no matter what other high profile projects he does, Wan will always be most closely associated with the horror genre. Not only did Saw spawn a massively profitable seven-film franchise - with an eighth entry coming soon - Wan is also the driving force behind two other hugely successful horror series: The Conjuring and Insidious. The Conjuring has so far received one direct sequel and two spinoff films - with another sequel and two spinoffs in the pipeline - and Insidious is gearing up to present audiences with its fourth installment.

Related: James Wan Offers Conjuring 3 & Crooked Man Movie Updates

Critical opinion on each Insidious movie has varied, but the franchise as a whole has raked in $370 million worldwide, all on production budgets of $10 million or less. When a franchise performs that well, Hollywood generally wants as much of it as it can get, thus Insidious: The Last Key. The plot this time out sees things get personal, as Elise is faced with a haunting that targets her own family. Somewhat confusingly, this fourth chapter is set soon after the third, which was itself a prequel to the first film. Regardless, genre juggernaut Blumhouse Productions has released the first trailer for Insidious: The Last Key, and it promises more creepy, demon-packed scares. Check it out above.

Returning for Insidious: The Last Key are stars Lin Shaye, Leigh Whannell, and Angus Sampson. Shaye plays powerful medium Elise Rainier, while Whannell and Sampson play her nerdy sidekicks Specs and Tucker, respectively. The three characters began as supporting players in the first two films, before being pushed more toward the forefront in Chapter 3.

Taking over directing duties for Insidious: The Last Key is Adam Robitel, helmer of the widely acclaimed 2014 indie horror feature The Taking of Deborah Logan. Star Whannell once again wrote the script himself, as he has done for all of the previous Insidious movies. If The Last Key performs as well as its predecessors, Whannell may very well soon find himself asked back to write a fifth entry.

NEXT: The 8 Scariest Moments in Modern Horror Movies

Source: Universal Pictures/Blumhouse

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