Warning: SPOILERS ahead for WandaVision episode 6.
Quicksilver jokes in WandaVision episode 6 that Wanda has created her own “Shangri-La,” hinting at a tragic ending for the residents of Westview — particularly her twin boys, Billy and Tommy, and Vision. Quicksilver and Wanda, dressed in their original comics costume for Halloween, have a heart to heart during Westview’s Halloween festivities, and Wanda asks Pietro why he looks different. He shrugs her concern aside, stating “You tell me. If I found Shangri-La, I wouldn’t wanna be reminded of the past either.” The moment is an offhand joke to avoid addressing Wanda’s (very relevant) question, but it also foreshadows the dark truth about Westview.
Titled “All-New Halloween Spooktacular,” the episode shed some light on the newly arrived Quicksilver, played by Evan Peters. Peters previously played the character in Fox’s X-Men franchise, while Aaron Taylor-Johnson portrayed the MCU version who died in Avengers: Age of Ultron. While questions remain regarding his surprise resurrection, episode 6 demonstrated that this Quicksilver possesses insight into Wanda’s character, as well as the circumstances they find themselves in.
Pietro’s ability to seamlessly fold himself into Wanda’s sitcom reality suggests that he has more agency in their world than most, including Vision. Some have theorized that Quicksilver is really Mephisto and is WandaVision‘s villain. Pietro certainly has an understanding of Westview that runs deeper than any other resident so far, and this knowledge makes him suspicious. Moreso however, it makes his reference to Shangri-La that much more prescient — and threatening.
Shangri-La has transcended Lost Horizon, and in popular culture, the concept is similar to other mythical paradises like the Garden of Eden or Utopia. However, given what happens to Vision when he tries to leave the hex, the comparison between Westview and Shangri-La is particularly apt. Quicksilver’s comment foreshadowed the harrowing scene of Vision breaking down after passing through the barrier. It’s possible that Quicksilver, Tommy and Billy will similarly be unable to live outside of the hex because it brought them to being.
The other residents may be in danger as well: Monica Rambeau escaped Westview, but she is suffering unknown effects due to her short time exposed to Wanda’s powers. Vision discovered that the residents are all being controlled by Wanda, and that the experience is excruciating for them — it’s possible that some, if not all, of the Westview residents will also suffer physical side effects from their exposure. One thing is for certain: by the time WandaVision ends, the residents of Westview will have some serious emotional scarring.
Originally from https://screenrant.com/wandavision-shangri-la-lost-horizon-vision-quicksilver-die-hint/