Word actually leaked out on Friday that Marvel's next motion comic will be Iron Man: Extremis, but the publisher makes it official this morning with this announcement, and trailer, on Entertainment Weekly's PopWatch blog.

As we speculated last week, the motion comic adapts the 2005 story arc by Warren Ellis and Adi Granov that heavily influenced the story and look of the first Iron Man film.

The first six episodes of Iron Man: Extremis will be available for download from iTunes, Zune and Xbox Live for $1.99 each beginning April 16 -- ahead of the premiere of Iron Man 2 on May 7. Each additional episode will be released every two weeks.

Iron Man: Extremis is Marvel's third motion comic, after Spider-Woman and Astonishing X-Men (both now available for free on Hulu). You can watch the trailer for Extremis at PopWatch.