Marvel Unveils Black Widow and Caption America 'Avengers: Age of Ultron' Concept Posters

When Marvel unveiled concept art posters for Iron Man and the Scarlet Witch on Wednesday, it looked like the studio was just showing off some cool art before Comic-Con. With Avengers: Age of Ultron concept art posters for Scarlet Johansson's Black Widow and Chris Evans' Captain America debuting on Thursday, it's now clear that Marvel has bigger plans for these posters.

Like the Marvel Cinematic Universe itself, these Age of Ultron posters are coming together to form one giant poster for the upcoming film.

With the poster for Black Widow showing off hints of Thor and Hulk, there are still two more gaps left to fill in. Hawkeye and Quicksilver? We'll find out as the weekend progresses.