There are a lot of rumours surrounding Doctor Strange in the Multiverse of Madness, including possible plans for Clea in the Marvel Cinematic Universe. The prevailing theory right now is that Rachel McAdams is taking on the role of Christine Palmer and an indendical Clea Variant, which you have to believe would throw Stephen Strange for a loop.
Recently, stuntman Mark Wagner took to Instagram to reveal that, after working on the Doctor Strange sequel, director Sam Raimi gifted him a copy of 1981's Doctor Strange #48. "When the director gives you some of his reference materials as a wrap gift," he writes, suggesting that this issue was particularly important to the filmmaker while working on the blockbuster.
This isn't exactly a key issue in Strange's history, but it does prominently feature Clea on the cover. The daughter of Dormammu and Sorcerer Supreme of the Dark Dimension, we're sure you can figure out how she could become a key player in the MCU. Wong, Doctor Voodoo, Sara Wolfe, and Morgana Blessing also appear in this comic book, and it's possible there may simply have been a visual Raimi liked.
With that in mind, we can't say for sure that this "confirms" plans for Clea in Doctor Strange in the Multiverse of Madness, but that's the prevailing theory among comic book fans online.
It's worth noting that this movie will introduce a Kamar-Taj sorcerer who is named "Sara," so another possibility is that she's based on Sara Wolfe. For now, we'll just have to wait and see.
Doctor Strange in the Multiverse of Madness arrives in theaters on May 6!