His first published work was a 22-page black and white project,
Claus & Simon in Hollywood, with fellow artist
Santi Arcas, which was bought by Spanish publisher
La Cupula when Acuña was 22. This work was followed by
Claus & Simon: Freakshow, and
Claus & Simon: Disaster Box. The "Claus & Simon" series is about the adventures of a clown and an anthropomorphic dinosaur. The last story was done for the French market and later reprinted in the popular
American magazine
Heavy Metal (under the title
Claus & Simon: Kings of Escape). However, in 2007 it was announced that Acuña had signed an exclusive contract with
Marvel Comics, to start in 2008, and would be leaving
DC Comics. Acuña had previously only done covers for Marvel; his first interior work for the publisher was
The Eternals, which debuted June 2008. In 2010 Acuña drew the Black Widow ongoing series with writer
Marjorie Liu. In October 2015 he and writer
Nick Spencer started the series Captain America: Sam Wilson. ==Personal life==