The Avengers,
The Avengers 2 writer/director and Phase 2 helmer Joss Whedon is currently revising his script for
The Avengers Sequel. This is known fact because he already told the media he was done with his first draft a couple of weeks ago.
Now it appears a tiny bit of information from said first draft of the script may be available. According to a person within the script writing community, as of right now it is being whispered through the rumor mill that Whedon is not calling the new additions to the Avengers team by their “mutant names” of Scarlet Witch and Quicksilver. They are being called Wanda and Pietro Maximoff.
It cannot be stressed enough that this is a
rumor right now and could change during any of the multiple revisions that Whedon will make to the script in the coming months and before filming begins sometime in the first half of 2014. Films usually get anywhere from 3–6 revisions before principle photography begins and sometimes revisions occur during the filming process as well.
Based on this rumor, The Daily SuperHero reached out to an Intellectual Property lawyer and asked if this was possibly being done by Marvel Studios and Whedon because Fox also has the movie rights to the brother/sister combo. The lawyer gave a resounding yes as his answer. Stating that due to the dual ownership of rights and the fact that Marvel Studios cannot use the word mutant, they could be taking a different approach to the duo to differentiate them in case Fox decides to use them down the road.
It sounds like this could be a means to use a Marvel Studios version of the brother and sister, while Fox can still use the “mutant names” and if they chose to use the siblings in the future. (That's all speculation by the way.) However, it would be a very long time until seeing Scarlet Witch and Quicksilver in Fox's Marvel movies seeing as how actor Michael Fassbender's Magneto character is quite young and probably not going to have his mutant children anytime soon.
That's possibly another reason why Marvel Studios is jumping at the chance to use them first but how their origin will be told remains to be seen. Or if this rumor holds true and they are not called by their “mutant names.”