Rivals of wonder not only did it reintroduce older, niche Marvel Comics characters into its roster of characters, but it redesigned aspects of Marvel characters that audiences became hooked on thanks to the MCU. No character represents a return to comic book form better than this one Rivals of wonderadaptation of Scarlet Witch.
Although not all characters present in the MCU e Rivals of wonder have clear differences, Scarlet Witch is certainly one of the few. Just a few characters ahead Rivals of wonder roster has yet to appear in the MCU, including Peni Parker, Luna Snow, Jeff the Land Shark, Venom, Squirrel Girl, and all members of the X-Men.

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The adaptation of Scarlet Witch in the MCU
Since the main hook a Rivals of wonder' focuses on the multiverse, the game is able to justify changing characters to make them very different or more similar to the MCU or various versions of characters from the Marvel Comics universe. In the case of Scarlet Witch, Rivals of wonder seems to lean more towards his original characterization in the Marvel comics, which represents some key differences from the MCU adaptation.
Why mutants have yet to be introduced into the MCU and Age of Ultron was released before Disney's acquisition of Fox, the MCU gave the Maximoff twins their powers through experimentation rather than birth. While this change was understandable due to copyright, it cannot be overstated how important the Scarlet Witch's mutant identity is in Marvel Comics. His impact on mutantkind leaves a drastic mark on comic book history and is still a major plot point in comics that run to this day.
Furthermore, the Maximoff twins are of Romani-Jewish origin. While Elizabeth Olsen initially gave Scarlet Witch an accent when playing her Age of Ultronthis accent eventually disappeared. Additionally, Olsen is not of Romani-Jewish descent, which has led some fans to be critical of his casting.
The MCU's depiction of the romantic relationship between Vision and Scarlet Witch is quite accurate. WandaVision AND Agata always they continue this storyline by introducing their twins, Billy Kaplan and Tommy Shepherd. This plot is also fairly faithful to the comics, with Wiccan being officially introduced Agata always.
Marvel Rivals adaptation of Scarlet Witch
Scarlet Witch's abilities in Rivals of wonder they are quite congruent with his powers in the MCU and Marvel comics. Descriptions of her abilities specifically mention “Chaos Magic”, which has been previously mentioned in both the MCU and comics alongside Scarlet Witch. Scarlet Witch's “Reality Erasure” ability is also in line with these abilities, considering she is able to manipulate reality at will.
However, there are key differences between the MCU adaptation and Rivals of wonder'. That is to say, Rivals of wonder took the opportunity to make Scarlet Witch more comically accurate. Rivals of wonderScarlet Witch's design is an example of this. Her skin and hair are darker, more in line with her appearance as a Romani-Jewish woman, and she has an accent. Players can see the design difference between Rivals of wonder and the MCU as a Multiverse of madness there is a skin for Scarlet Witch in the game.
Scarlet Witch is a mutant again
Magneto is the biological father of both Maximoff twins rivals of wonder, as discussed through several voice lines between Magneto and Scarlet Witch. The characters also have a team together.
Additionally, Scarlet Witch has a voice line that mentions “No more mutants.” This is also an achievement that Scarlet Witch players can unlock after defeating mutant enemies ten times like her. The quote “No more mutants” is a direct reference to the “House of M” storyline, in which Scarlet Witch took away the mutant abilities of most mutants. This plot point fundamentally changed Marvel Comics. Of course, the MCU hasn't officially introduced mutants into its main timeline, making it impossible to adapt Wanda's legacy and this major storyline so far.
Ultimately, most of the differences between Scarlet Witch in the MCU and Rivals of wonder they are thanks to Marvel Comics. Scarlet Witch is a sign of this Rivals of wonder it's likely that he will turn to the comics for inspiration on the character roster in the future, rather than basing anyone primarily on their MCU counterparts.