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She teased: "There's going to be a tragedy in the village in January that's going to affect two of our most-loved families.
"It's ultimately going to tear friendships apart and change the dynamics of one of those families forever."
Meanwhile, Moira Barton (played by Natalie J Robb) is set to reveal a dark secret from her past to a villager.
"Moira's going to make a big confession to one of our villagers," Laura said. "It's a secret from her past that she's going to reveal.
"Moira does it to try to help the person that she's talking to, but how is that person going to react when they find out Moira's deepest, darkest secret?"
Laura cryptically added: "If they blow it, it could threaten Moira's whole life."
Caleb Milligan's (Will Ash) mystery wife is also set to burst onto screens a year after his debut on the ITV soap which ruffled the Dingles' feathers.
"We've heard mention before of Nicky's [Lewis Cope] mum and Caleb's wife," Laura shared.
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"We've just heard little bits from Caleb where he's said it's all over between them and there's nothing going on. But is that really true?"
She added: "In the New Year, we'll see Ruby bursting onto our screens. She's going to be an absolute firecracker [and] she's going to put a real spanner into the Dingles.
"Is her and Caleb's relationship really as over as he's made out? We'll find out in the New Year."
Emmerdale has also confirmed a familiar face will make a comeback to the Yorkshire Dales next year.
While it is yet to be revealed who returns, Laura teased: "A familiar face is returning in the new year. This person comes back to help one of our villagers who is in a bit of trouble."
Could it be a character like Kerry Wyatt (Laura Norton) who stepped away from the show recently, or a face from the past?
Emmerdale airs on weeknights at 7.30.pm.