Well, they should let him.
Our very own "friendly neighborhood Spider-Man," Tom Holland, recently spoke with MTV about his desire to work alongside Paul Bettany and Elizabeth Olsen. "I think the WandaVision show looks really cool," the actor spills, "I don’t really understand what is going on but it looks really cool!"
Well, let me explain to you, Tom. WandaVision follows the life Wanda Maximoff / Scarlet Witch has presumably created – sitcom-style – for her and Vision. In that sense, it's interesting how Spider-Man can work in that setting, however, we know that Wanda is able to warp reality, so the thought of Spider-Man somehow appearing in WandaVision isn't too crazy.
For now, it's unlikely if Tom will appear in WandaVision as there has been no word since the interview. Fear not though, we will still see the web-slinger in the 3rd MCU installment of Spider-Man set to premiere in 2021.
WandaVision will be released in December 2020 on Disney+.