Earth-MC010

History
Ultron returns and slaughters the Avengers, and proceeds to build an army of Ultron Sentinels, killing most of New York's heroes and citizens, begining the Age of Ultron.

Small pockets of resistance are started by some of the surviving heroes.

Trivia

 * This reality combines elements of the original Age of Ultron reality and the reality seen in Next Avengers: Heroes of Tomorrow.