Almost all avid fans of "The Vampire Diaries" are expecting the return of Nina Dobrev in the eighth and final installment of the drama series. With the final season, everyone is holding on to Dobrev's promise to Julie Plec of coming back.

In the recent report by Celebrity Laundry, Dobrev shared some photos that the actress may be getting in shape for a series finale comeback on TVD.

Dobrev was reported to have completed a seriously physically challenging obstacle course called "Tough Mudder" challenge in Toronto. She was a member of Team Mudholes and the 27-year-old actress also posted a photo on her Instagram account of them completing the challenge.

With this, reports added that Dobrev may need to be in the best physical shape of her life for the series finale as there would be a possibility of her character Elena coming back to do battle with Ian Somerhalder’s character Damon and Paul Wesley’s character, Stephan.

Moreover, “The Vampire Diaries” actress was also speculated to reprise her role as Katherine to another CW vampire drama, “The Originals” season 4, for a cameo appearance.

Meanwhile, “The Vampire Diaries” is teasing the fans about the beginning of the finale with its Season 8 trailer being released.

The trailer showed more of blood, brothers and bites everything a TVD fan would want to see. However, the absence of Nina Dobrev was also noted in the short, 20-second promo trailer and have hinted that the producers and showrunners may have failed to convince Dobrev for a comeback.

Reports then speculated that Elena Gilbert’s story will end and there will be no happy ending for Damon and Elena, if Dobrev will not come back for the series finale as “The Vampire Diaries” season 8 release date is on October 21 at 8 p.m. ET/PT on the CW Network.