Battle at Hyde Park marks the battle between the heroes and various Slaughterhouse Nine clones.
The heroes arrived in Hyde Park, but found no signs of anything wrong.
The attack began when one of the capes started morphing into a monster, seemingly the work of Psychosoma. Another cape incinerated it before it could hurt anyone, however, it turned out to be a Nyx illusion and an innocent cape had been killed. There were also several Night Hags present that made the situation very difficult.
The Slaughterhouse Nine clones had the upperhand, until Contessa and Number Man stepped out of a portal and singlehandedly murdered every single clone.