In a recent interview with Rolling Stone, Sam Raimi admitted that although they studied WandaVision in preparation for Doctor Strange in the Multiverse of Madness, he has not watched the whole show. Instead, he explained they looked at key moments from the miniseries because they were told they would directly affect the Doctor Strange sequel. The director said they focused on "a proper through line and character-growth dynamic" from the show. Read Raimi's full quote below:
"I'm not really sure what the WandaVision schedule was or how it changed. I just know that halfway, or maybe three-quarters of the way into our writing process, I'd first heard of this show they were doing and that we would have to follow it. Therefore, we had to really study what WandaVision was doing, so we could have a proper through line and character-growth dynamic. I never even saw all of WandaVision; I've just seen key moments of some episodes that I was told directly impact our storyline."