There are many characters that were once villains and have a change of heart. There are also some that started off as heroes and then turned to the dark side. This isn't an unusual occurrence and we often see characters flip flop back and forth between good and evil. The Scarlet Witch is one character that has been on both sides of the playing field.
When Wanda Maximoff was first seen, she and her twin brother Pietro had been rescued by Magneto (unknowingly their true father) and they felt they owed him a debt. They fought along side Magneto in the Brotherhood of Evil Mutants but soon found their way in Captain America's team of Avengers along another former villain, Hawkeye. Thus, the Scarlet Witch was now a hero.
It appeared that Wanda's life was on track as she married the synthezoid Vision and, through her ability to manipulate probability, became pregnant and gave birth to twins. It was soon revealed that her twins here actual missing shards of Mephisto's soul and her children were gone. Wanda couldn't cope with the loss and turned against the Avengers.
Wanda eventually reverted back to her good self and became a hero again but this wasn't the last time she would switch sides. Is the Scarlet Witch's true nature to be a superhero or a supervillain?== TEASER ==
Besides her mutant powers to affect probability, Wanda later developed the ability to channel chaos magic. That meant she could alter reality. Suffering another breakdown at the thought of her missing children, she began to rewrite reality in the Avengers Disassembled storyline, causing the deaths of Vision, Scott Lang and Hawkeye as well as returning her children to life.
Magneto took her to Genosha after Dr. Strange shut down her mind. This lead to her creating the House of M reality and ended with her "No more mutants" proclamation, causing nearly all mutants in the world to become devoid of their powers and abilities.
After spending some time in Wundagore, she ended up engaged to Dr. Doom in Latveria with no recollection of her past or the fact that she had powers. The Avengers, Young Avengers and Magneto sought her out with some members wanting to save her and others wanting her dead.
Surprisingly, we really haven't seen much of the Scarlet Witch between House of M and now. As a fan-favorite character and one that has become so powerful, it seems a shame for her not to be used. It's just a matter of how she should be used.
Where we left off in Avengers: Children Crusade, she now remembers everything. That brings us back to the question of what would be best for her character or what would we like to see done with her?
There's an appeal to reading stories focused on heroes and ones dealing with villains. There are also certain limits involving both. The idea of Scarlet Witch being a completely evil and ruthless villain would make for some excellent reading. The problem would be, is there any way to come back from that? Sure it's possible for villains to redeem themselves. Wanda's father, Magneto, is a perfect example. But there will always be that sour taste in readers and other characters' mouths.
We have seen Scarlet Witch do some truly evil things. She caused the deaths of some teammates (it doesn't matter that some were brought back to life, we are talking about comic books after all) and she was also responsible for disassembling the Avengers.
I would like to see her return to being a hero. It won't be an easy feat. Wolverine is ready to kill her without a second thought. She can try to atone for what she's done but there will always be that doubt. To me, that's what would spice things up. She would be the proverbial time bomb, ready to go off at any moment. Fellow heroes and villains will be on edge around her which gives her an extra edge over everyone. She had her taste of being a bad girl but it's time for her to become an Avenger once again. Seeing other heroes and mutants try to accept her and overlook her sins would make a much more interesting story over people simply fearing her as another villain running around.