One shot telling the story where Iron Man dies instead of Captain America.

The book goes through the five stages of grief just like the Fallen Son series already had, only quicker (to fit it all in one book). The stages are about a page or two each. The ending of the story has Iron Man's casket floating in outer space with the Skrull invasion (which happened to end the Civil War in the normal story arc) heading towards Earth in the background. The Watcher sees the inevitable doom of the green planet without the help of the, now dead, Iron Man and says, "It wasn't supposed to be this way..."

Also featuring part 2 of What If the Runaways became the Young Avengers? Part 3 continues next week in What If? Fantastic Four.