Darcy reveals that by going in and out of the Hex, as the Westview phenomenon is now called, “The energy inside has rewritten [Monica’s] cells on a molecular level twice.” She tells Monica, “It’s changing you,” but Monica doesn’t care. She’s intent on finishing this mission and saving the town. Beyond that, no one — except for maybe Hayward — knows what exactly this molecular change entails.
As with everything else in the MCU, this is likely to have long-lasting implications for Monica’s future. Although we still don’t know what the tension between Monica and Carol Danvers (Brie Larson) is about, Monica is likely aware of Carol’s history and how she got her abilities by absorbing energy from an Infinity Stone. In the MCU, Wanda’s abilities are created from another Infinity Stone, and now Monica has absorbed some of that power herself. In the comics, Monica gains superpowers through a similar situation when she is bombarded by extra-dimensional energy. As a result, she has a range of abilities, including the power to transform herself into any form of energy on the electromagnetic spectrum. On top of that, she can fly, become invisible, and phase through objects. Monica’s powers are obviously vast, and not that dissimilar from Captain Marvel’s. Is WandaVision offering us a Monica Rambeau origin story of sorts? It’s highly likely.
After WandaVision‘s first season, the next time Monica will be on screen — as far as we know — is in the Captain Marvel sequel. The film currently has an expected release date of November 11, 2022, and will also feature the big-screen debut of another new character, Ms. Marvel a.k.a. Kamala Khan, played by Iman Vellani.