Disney blog Stitch Kingdom has got ahold of a batch of high resolution images from Marvel's Avengers: Age of Ultron. The images include a still of Andy Serkis and reveals his character to indeed be Ulysses Klaw as listed by Marvel.
This character confirmation of sorts seemingly also gives the impression that Wakanda's presence will be bigger than previously expected. Something that might have been hinted to in the second trailer.
Klaw is primarily known as the most well-known of Black Panther rogues.
There hasn't been word if we'll see Chadwick Boseman's T'Challa in the film but there have been hints he could show-up at the very end with a cameo but that remains to be seen.
It's expected some of T'Challa's story will be told in Captain America: Civil War, we shouldn't be shocked to see Serkis' Klaw involved in that film as well since the role is expected to crossover a couple of films.
SOURCE: STITCH KINGDOM