Marvel Studios opted to forego their traditional post-credits scene in Avengers: Endgame — making it the very first MCU movie to do so. Instead, they featured the metal-clanking sound of Tony Stark building Mark I in a cave in Afghanistan. Ultimately, this creative decision was for the best as the unorthodox reference heightened the sense of nostalgia, not to mention a final tribute to Iron Man, who heroically died in the fight against Thanos. Additionally, it would’ve also spoiled the fact that Vision’s story continues past the events of the Infinity Saga, which instead allows for a major reveal in WandaVision.
Interestingly, during Vision and Wanda’s intense argument towards the end of WandaVision episode 5, the synthezoid confirmed that he has no memories. He didn’t get into specific details but based on their conversation, it seems like Vision is totally in the dark about what happened before his life in Westview, including dying at the hands of Thanos in Avengers: Infinity War. The episode in general also confirmed that he’s unaware of Wanda’s actions that created their fantastical world. Since SWORD’s intel came from CCTV footage of Scarlet Witch and it doesn’t reveal how the organization collected Vision’s body in the first place, perhaps WandaVision can more fully repurpose Avengers: Endgame‘s unused post-credits scene and incorporate it on the show.
Originally from https://screenrant.com/wandavision-endgame-deleted-postcredits-vision-dead-scene-canon/