Bettany shared the news in a recent episode of the Lights Camera Barstool podcast.
The actor, who portrays Vision in the Marvel show, was asked how surprised viewers can expect to be by the end of the series, and where their mind will be after the final episode airs.
“I think they’re going to be massively surprised by the end of this show,” Bettany replied.
“I really think people are going to be like, ‘Oh my God!’ They’re going to look at the MCU in a whole new light and also have a much deeper understanding about what direction it’s moving in.”
The actor then teased an upcoming element he says has been kept “completely under wraps” so far.
“I worked with this actor that I’ve always wanted to work with,” he says. “We have fireworks together. The scenes are great, and I think people will be really excited. I’ve always wanted to work with this guy, and the scenes are pretty intense.”
Bettany then joked he was likely going to get a call from Marvel telling him off for revealing the information.
WandaVision, also starring Elizabeth Olsen as Wanda Maximoff/Scarlet Witch, is streaming now on Disney+. The first two episodes aired on 15 January, and a third one followed on 22 January.