Avengers:Age of Ultron -just in, confirmed casting news

Marvel finally announced today that Elizabeth Olsen and Aaron Taylor-Johnson are officially signed on for their upcoming Avengers: Age of Ultron.

Strait from Marvel Studios
Aaron Taylor-Johnson and Elizabeth Olsen have officially joined the Avengers family as the brother-sister duo of Quicksilver and Scarlet Witch in Marvel's "Avengers: Age of Ultron," the highly-anticipated sequel to 2012's smash-hit "Marvel's The Avengers"! "Avengers: Age of Ultron" arrives in theaters May 1, 2015.

"Avengers: Age of Ultron" will bring the Marvel Universe's biggest heroes together again to face one of their biggest villains, with "Marvel's The Avengers" director Joss Whedon returning to write and direct the sequel. "Marvel's The Avengers" was released in 2012 and went on to earn $1.5 billion worldwide, making it the third-largest grossing movie of all time.

In addition to "Avengers: Age of Ultron," Marvel Studios will release a slate of films based on the Marvel characters including "Captain America: The Winter Soldier" on April 4, 2014; "Guardians of the Galaxy" on August 1, 2014; and "Ant-Man" on July 31, 2015.
  

X-Men & Avengers CROSSOVER news and Marvel Avengers: Age of Ultron casting news

Joss Whedon was recently asked about his thoughts about the possibility of an  X-Men and Avengers crossover movie.
Anyone who has read the comics will know that it has happened and that both teams share on many occasions the same nemesis
When asked about a possible crossover Whedon states "“That’s not the plan. It would be cool but I think right now I already have a ton of very talented actors in my movie playing a ton of characters, and I’m about to add a few more. So I’m not like, ‘How can we get more licensed characters because I want to kill myself and make a nine-hour movie."

For all you Avengers fans out there, the casting of Elizabeth Olsen as Scarlet Witch has to be a pretty interesting announcement.
Not because Elizabeth Olsen is cast, but because the famed comic book villain-ess  Scarlet Witch will be in the film.
Best known for her association with The Brotherhood of Evil Mutants,  Scarlet Witch is twin-sister to Quicksilver and (in the comics) she is a well known nemesis to the X-Men more-so than The Avengers...

I for one, would certainly not bet against studios working together to bring you a crossover film in the future.