The Avengers: Age of Ultron is shooting in Italy and local photographers have snapped location shots of the characters in costume, offering our best look yet at newbies Quicksilver and the Scarlet Witch. The sequence has them battling Ultron alongside Hawkeye, and it looks like a lot of stuff got wrecked.
I like Scarlet Witch's outfit A LOT. Expect to see this at future cons - it's an easy cosplay that will look good on anybody. Quicksilver... well I guess nobody's getting him quite right. I like this better than X-Men: Days of Future Past Quicksilver if only because this is an outfit you might wear if your power was running fast. Also, it's important to realize that The Avengers: Age of Ultron takes place over a couple of days, and the Twins (as they're known) don't have a lot of time or reason to get costumes. Don't be surprised if they have different outfits at the very end of the movie, or in Avengers 3.