• Actors Gaten Matarazzo, Noah Schnapp, Caleb McLaughlin, Natalia Dyer, Millie Bobby Brown and Finn Wolfhard of 'Stranger Things' attend the BUILD Series at AOL HQ on August 31, 2016 in New York City.

Actors Gaten Matarazzo, Noah Schnapp, Caleb McLaughlin, Natalia Dyer, Millie Bobby Brown and Finn Wolfhard of 'Stranger Things' attend the BUILD Series at AOL HQ on August 31, 2016 in New York City. (Photo : Getty Images/Michael Loccisano)

"Stranger Things" Season 2 just aired its first ever 36-second trailer, and it already opened a lot of questions about what's coming to the show.

The "Stranger Things" trailer debuted to massive applause from fans, generating widespread social media buzz enough to eclipse the other 65 brands that advertised during Sunday's 2017 Super Bowl.

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According to Variety, the "Stranger Things" Season 2 trailer generated 307,000 tweets on Twitter. The teaser gained 21 million views on Facebook and 3.6 million on YouTube. One of the most talked-about scene was the one where characters Dustin (Gaten Matarazzo), Mike (Finn Wolfhard) and Lucas (Caleb McLaughlin) wore "Ghostbusters" costumes.

Producer Shawn Levy told Vanity Fair that Season 2 is going to be bigger and potentially darker.

"The threat, which in Season 1 was to Will Byers, has grown. That's all I'm going to say! But, I will say Season 2 has a bigger cast and is definitely loyal to the kind of magical storytelling that we established in the first season. It's character-based and still about our core group of characters," he added.

"Stranger Things" Season 2 is set in 1984 around Halloween, which is about a year since the events in the first season. Although it seems that everything is back to normal, "darkness lurks just beneath the surface."

The core cast members will return, including Millie Bobbie Brown's Eleven. Joe Keery, who plays Steve Harrington, and Noah Schnapp, who plays lost boy Will, have been elevated to season regular status. However, Barb will not return to show as the character is dead for real.

The show will also introduce a new set of characters, including a young girl named Max and her bad boy big brother Billy. There's also going to be another love triangle, care of Chief Hopper (David Harbour), Joyce (Winona Ryder) and their high school friend Bob (Sean Astin).

There are also speculations that "Stranger Things" Season 2 might magnify its political themes, given David Harbour's fiery speech at the 2017 SAG Awards.

"Stranger Things" Season 2 will premiere on Halloween this year on Netflix.