so i just finished WandaVision on Disney+ (spoilers ahead)'
so this is my theory based on what me and my mom talked about:
Hydra and some other unknown company are working together to defeat the avengers and have kidnapped Wanda. They've trapped her in her own little paradise that could either be in her mind or could be a simulation. (evidence by how she can't remember simple things, like where she is from or when she got married to vision) Hydra has to send it different workers to keep the simulation running, evident by the bee worker man we saw climb out of the sewer in episode 2. The avengers know that Wanda is missing and are trying to contact her, and they know that she seems to be in a trance but they dont know who or what did it to her, evident by the voice in the radio saying "Wanda! Who's doing this to you?" I'm excited for the next episode so we can see what will happen since the world has turned to color now.