Yesterday, Marvel Studios debuted two of its "Avengers: Age of Ultron" promotional posters, featuring concept art from the upcoming Joss Whedon directed sequel. Now, via Movieweb, we can add Captain America and Black Widow to the roster of heroes being overwhelmed by a seemingly unending swarm of Ultron proxies.

The posters, painted by artist Ryan Meinerding, are currently available to Thursday attendees at Comic-Con International in San Diego, with more to be released as the show continues through the weekend.

Check out the posters below and stay tuned for more on Marvel Studios' SDCC announcements throughout the week.