The
commercials in WandaVision have always been crucial, usually focused on Wanda's past experience of trauma. But the one in episode 7 is particularly important, because it directly references something called a
"nexus." This apparently allows an individual to anchor themselves to the reality of their choice; side effects include "
feeling your feelings, confronting your truth, seizing your destiny, and possibly more depression." This is clearly a reference to the Nexus of All Realities, an established part of Marvel lore that was already subtly introduced into the MCU's Multiverse in
Thor: The Dark World. In the comics, the nexus was created by an ill-thought-through spell woven in the Florida Everglades, and it became guarded by the Man-Thing.