They wrote: “In episode 5, Wanda states that she does not remember how it all started. So Loki, disguised as her brother Pietro, does what Loki does best …he lies.
“He tells Wanda that the TVA trapped her there, and if she helps take them down, freeing him from his neck-strap explosive confines, he can get her the Mind Stone from a different timeline, a timeline before it was never destroyed.
“With the Mind Stone, Wanda can bring the real Vision back from the dead.”
The theorist also highlighted why they believe Loki works better as the main villain in WandaVision than the predicted Memphisto.