Nancy will be around for the next fight with her friends, meaning that the attempt to break the curse will work.
Nancy Wheeler is the latest victim of Vecna at the end of the fourth season of Stranger Things, but there is a theory on how she escapes. It would make sense for the rest of the group to go back through the gate and help Nancy, with Eddie playing whatever song Robin discovered. The new friendship between Nancy and Robin has become a highlight of season 4, so it's fitting that the core figure in the theory explaining how Nancy is saved is Hawke's character. The use of her favorite song, Kate Bush's "Running Up That Hill," helps, but so does using the memories of her family and friends. It's possible that Eddie steps up to personally play Nancy's song to help break her free, which is in line with a shot of Quinn's character in a pre-release trailer.
Nancy was able to break into Vecna's mind after seeing the site of Barb's death. However, when it's Nancy's turn, Steve discovers she's stuck through Vecna's curse.
Eddie playing his guitar on a roof in the Upside Down was one of the most intriguing scenes in the fourth season of Stranger Things. Nancy is shown in the preview for volume 2, but how will she escape the curse? The group can use Nancy's favorite song to encourage her to break free. The song reiterates that music and familiarity can still be used to save people from Vecna's curse. The guns are not in her room because the Upside Down is stuck in 1983, before her firearms existed.
Max has been the only potential victim of the curse so far. The Upside Down Gate is where the younger group breaks open for the older teens to travel through. Nancy might be able to escape Vecna's curse if she picks up cassette tapes on the bedside table.
Nancy found herself in the Upside Down after following Steve into the "Water Gate" under Lover's Lake.
If Robin and the group discover Nancy's favorite song, they would have to figure out how to play it. The first volume of the season ends with Vecna's curse in the Upside Down.
Nancy wants the group to go to her house to get her guns. Nancy is at Pennhurst when Robin discovers this point, which could be the key to saving her. Some of the group have been in Nancy's room before. Eddie goes back into the Upside Down after "Chapter Seven: The Massacre at Hawkins Lab" in volume 1. That leads to Eddie's guitar, which he talks to and kisses in the first episode. Nancy doesn't have a cassette player, so they would need to use resources within the trailer.