More here about Wanda Maximoff ... and here ... and here. This whole "Week of the Witch" thing, plus the role that seems laid out for The Scarlet Witch in the upcoming X-Men vs. Avengers event, constitutes a big push for the character, so I'm hoping it signals a return to her status as a major figure in the Marvel Universe.
That's largely because The Scarlet Witch has been one of my favourite comics characters since I was a kid, but also because Marvel really needs to invest in its major female characters.
Meanwhile, I'm not entirely sure what I think of this development. There is currently no character in superhero comics called "Captain Marvel" - though Marvel Comics owns the name as a result of some complex legal ins and outs in past decades. Thus the original Captain Marvel character, created by Fawcett Comics in 1939, and later owned by DC, can no longer be depicted or promoted with that name.
Marvel's own Captain Marvel character (created in 1967) was killed off in a classic story, The Death of Captain Marvel in the early 1980s, and has never been "brought back to life" in any ongoing way.
It seems that Marvel Comics has now decided to fill the gap by renaming a high(ish)-profile character, Ms. Marvel, as "Captain Marvel" ... and promoting her under the new name in a new ongoing book (at the same time, I see, giving her a less blatantly sexy costume). There are some good aspects of this, but I'll miss the name "Ms. Marvel": the character, Carol Danvers, had established an important place in the Marvel Universe under that superhero alias, as well as developing an iconic look of her own. Overall, I hope the new move succeeds commercially - even though it will be a wrench at first - mainly for the same reason as I gave with Wanda Maximoff, that Marvel needs to invest in its major female characters.