Netflix's sleeper hit "Stranger Things" is coming up for its second season and fans are anxious to find out whether Eleven (played by Millie Bobby Brown) will return to the series. Well, consider the mystery solved: she is. In fact, now, the biggest concern for "Stranger Things" Season 2 is: Will the Demagorgon be back, and is Will its new host now?

Lucky number Eleven

Yes, Millie Bobby Brown, aka Eleven, will be back as a series regular on "Stranger Things" Season 2 although it's yet unknown how she will do it after disappearing in the first season's final episode.  However, it's reassuring for fans who want to see more of the Eleven-Mike dynamic in the series.

Possible storylines for 'Stranger Things' Season 2

Although there haven't been clues regarding the possible storylines for "Stranger Things" Season 2, showrunners the Duffer brothers previously teased that the new season will pick up on the events of 1984, the year after Will Byers (Noah Schnapp) was trapped inside the Upside Down. It will begin to delve into the mythology of his disappearance, TVLine reported, so fans might finally get to understand the origin of the Demagorgon and how the government experiments play into the "Stranger Things" Season 2 narrative.

Mirror.uk also reported that the Duffer brothers also revealed that "Stranger Things" Season 2 will be more about the consequences of last season's events. This means it's likely to look into the possibility of Will Byers and what happened to him after the Demagorgon held him hostage in the Upside Down. It will also be taking place over the span of a week, much like the events of "Stranger Things" Season 1.

"Stranger Things" Season 2 will also be seeing two new characters in the show: Dacre Montgomery as Billy, and Sadie Sink as his sister Max.

Excited for the next season of "Stranger Things"? The Netflix show will return to the screens on 2017.