This plot is from the comic
The unthinkable has happened. New york is in ruins and Ultron has come back to Earth to take over everything and everyone. Most super heroes have been killed and some are hiding in a secret place under central park. The surviving super heroes are iron man, Wolverine, Emma Frost, Luke Cage, Hawk Eye, Black Widow and Captain America. Captain America’s shield is broken and everyone else can’t do anything. Ultron is sending people to bring super heroes to him to kill. He almost was killed spider man but Hawk Eye saved him. Like I said the unthinkable happens.