According to a visual effects supervisor on the show, Lady Stoneheart will not be appearing in her belated debut on the show.
In the novels, Lady Stoneheart is the in the Red Wedding massacre as in the books, but her body was never brought back to life and Brienne of Tarth is very much alive (the fate of Beric Dondarrion remains up in the air after the season 7 finale).
With Game of Thrones entering its final six episodes, fans had begun speculating that Lady Stoneheart or some version of the undead character would at last make her appearance on the TV show. However, it’s now been confirmed by a GoT crew member that the character will not show up in season 8 after all. Speaking to Huffington Post, special effects supervisor Joe Bauer dismissed the fan theory with the blunt statement: “I saw it in the media, but it again never showed up in a script.”
In the same interview, Bauer also debunked several other fan rumors. He said ice spiders will not show up in season 8, as showrunners David Benioff and Dan Weiss determined that it was better to leave those creatures as part of Westerosi lore without actually visualizing them. He also shot down the big fan theory that the wights formed the Stark sigil as they stormed through the destroyed Wall at the end of season 7, a theory that many think confirms was not a nod to Ned Stark, though he its the director of the episode might have a different take.
Though Bauer seems to have thoroughly debunked several important fan theories with his statements, it’s always possible that he's deliberately spreading disinformation, and that Lady Stoneheart and ice spiders will show up in season 8. Fans of course have latched onto the Lady Stoneheart theory after several seeming clues in early trailers indicating that resurrection of dead Starks may play a part in the new season. Indeed, the precedent for resurrection was set on the show when The Mountain was brought back to life. Of course, The Night King himself possesses the power of resurrection, and fans have speculated that he might bring back a zombified Catelyn Stark to menace her surviving children the same way he resurrected the dragon Viserion in order to destroy the Wall.
Though it’s disappointing to many that lady Stoneheart likely will not in fact show up in Game of Thrones season 8, there no doubt will still be a lot of other dramatic and shocking developments as the final six episodes play out. There's arguably no bigger show on TV than Game of Thrones, and its final season is sure to be one of the biggest and most discussed events in TV and pop culture history.
Source: Huffington Post