'Bojack Horseman' may have predicted the death of fan-favorite Diane Nguyen in the upcoming season 6, suggests fan theory

That Diane Nguyen will meet her end in season 6 of the highly-acclaimed adult animated series is a popular theory doing the rounds

Spoiler alert for season five and the upcoming season six of 'BoJack  Horseman' on Netflix

Diane Nguyen (Alison Brie) is without a doubt one of the favorite characters on 'BoJack Horseman'. A show that satirizes Hollywood and topical humor, 'BoJack Horseman' also deals with depression, trauma, addiction, self-destructive behavior, racism, sexism and human expression. We first meet Diane as a human ghostwriter who is a well-reasoning, misunderstood intellectual and ghostwriting BoJack's book. 

But the Vietnamese-American, third-wave feminist then goes on to become one of the closest people to BoJack — someone who knows him very well, but not before it is awkward and strained after BoJack (Will Arnett) develops romantic feelings for her, especially as she was dating Mr. Peanutbutter (Paul F. Tompkins). 

At the end of season five, Diane bids BoJack adieu at the rehab. The last that we see of her is when she drives off into a tunnel. And that's where this fan theory stems from. 

The series is known for killing off characters in a realistic way. The biggest hint for Diane's death is a subtle allusion to the death of Princess Diana in 1997. The real Princess Diana died inside a tunnel in a car accident — which to many fans, is a clear foreshadowing from the writers of 'BoJack Horseman'. 

Why have fans stuck to this theory? Well, the show is no stranger to foreshadowing — Sarah Lynn's (Kristen Schaal) death was foreshadowed several times in the series. In season 1, the actress predicts that she will die young as a result of her destructive behavior. In season two, at Herb's funeral, she is the only one who doesn't suggest that BoJack will die next. Instead, she says that she's "so high I don't know where I'm looking", which foreshadowed her drug-related death. 

However, the fan theory although popular has divided fans — many do not believe this is going to be possible. "I think she will always be an integral part of the show and they wouldn’t kill her off," says one Reddit user. Some think that the parallels between Diane and Princess Diana are just red herrings. "But they could just as easily be trying to throw us off, and mess with everyone during the long months without new episodes," points out another user. Others believe the foreshadowing from season five has other significant aspects. "The significance of the Diana/tunnel thing could be more of a symbolic death/rebirth for the character," says one fan. 

It is fully possible that this is theory is just that — a theory. And that fans have nothing to worry about. Maybe the tunnel scene will open up the next season like nothing happened. 

The show has been renewed for season six, but release dates are not out yet. Seasons one to five are currently streaming on Netflix. 

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