User blog comment:Gcheung28/Fannotate the Latest Avengers: Age of Ultron Trailer/@comment-24895270-20141025200742

Ballerinas could be related to Black Widows backstory.

Andy Serkis appears to be Klaw, which if correct may mean that the molten metal Ultron's hand is in could be Vibranium.

Claudia Kim's character appears to be at dinner with the group.