Avengers 2: Age of Ultron Scarlet Witch & Qicksilver Concept Art

The Avengers 2: AOU peek in the 'Marvel Studios: Assembling a Universe Special'  included Scarlet Witch and Quicksilver concept art by Andy Park...

...and a glimpse of  what appears to be Hulkbuster Armor. via Marvel Movies!

They also threw the in some of the Ant-Man teaser stuffs at the end of the show without comment.

via Marvel.com