From Screen Rant
In an interview with Geek Girl Project, Campbell says Ash Vs. Evil Dead season 3 will contain the reveal that Ash has a daughter. He says:
“Wait until you see season 3, baby. It’s off the charts. We’re jumping off a cliff at the end. It will never be the same. The world will never be the same at the end of this season. There’s some big shit that happens – Ash’s daughter. Ash has a child. She’s in trouble. She’s a target. The demons are like the mafia. They go after your family. Not only has saved the world, now he has to raise a daughter — a teenager. An unruly teenager.”
The introduction of Ash’s daughter in season 3 of Ash somewhat mirrors a shuttered storyline that was pitched for season 2. In a December 2016 interview with A.V. Club, Craig DiGregorio, who left his post as Ash Vs. Evil Dead showrunner after season 2, said the alternate version of the season finale revealed that Ash actually fathered a girl who would grow up to be Kelly.
But from what Campbell told Geek Girl Project, the “Ash is a father” storyline will be a bit different. Acknowledging that Kelly are Pablo are not teens (“They’re the adults now,” he said), and saying the daughter is a teenager pretty much takes DeLorenzo out of contention to be the daughter of the chainsaw-handed, boomstick slinging, deadite killing antihero.
That means, naturally, that a new cast member or two (the daughter and her mother) is poised to join Ash Vs. Evil Dead season 3, but as to who they will be is up in the air. Campbell told Geek Girl Projectthat he would not be at the San Diego Comic-Con in a couple weeks, but rather at the New York Comic-Con this fall. That’s not to say that news of the new cast member won’t break at SDCC, but with lack of Campbell at the fan event, it will be interesting to see if there will even be an Ash Vs. Evil Dead panel. Whoever the new cast member or members will be, they are bound to be, as Ash would say, “groovy.”