We didn't get Mephisto, but it looks like we got someone totally different in 'WandaVision'.
Clea from the Dark Dimension, portrayed by Charlize Theron, has been officially introduced into the MCU in 'Doctor Strange in the Multiverse of Madness', but some fans believe that Marvel has been hinting at Clea long before the Doctor Strange sequel.
Remember Dottie from 'WandaVision'? Fans were pretty quick to realize that Agnes is in fact Agatha Harkness, but the theory suggesting that Dottie – the big name in Westview – is in fact Clea… just hits different now, doesn't it?
People started to suggest that Dottie was Clea back in 2021, when 'WandaVision' premiered, but the theory was largely downplayed.
And even though Dottie was obviously portrayed by Emma Caufield Ford, not Charlize Theron, we have just one word for you: variants.
Still, it looks like we'll have to wait a bit more for Clea to return: something that is apparently set to take place in the third Doctor Strange movie.