u/Fair-Air-2447

So picture this, Jason and Matt are chasing after a woman in Gotham when the woman runs into Batman, who is looking for criminals to fight. Batman turns around and attempts to console the woman, who is attempting to tell him about Jason and Matt. Suddenly, a shotgun blast, fired from Matt's shotgun, comes flying and hits Batman directly in the face. The woman manages to get away, while Jason and Matt are left unaware that they have just killed history's greatest detective.

How would the Justice League, Commissioner Gordon, and Batman's villains (Specifically the Joker) react to this? What would they do to stop Jason and Matt? Would Batman's villains team up with Gordon and the Justice League to stop the zombie slashers?

The survivors:

Tommy Jarvis (Friday the 13th Part VI: Jason Lives)

Laurie Strode (Halloween 2018)

The janitor (Willy's Wonderland)

Erin Hanson (You're Next)

The survivors get 5 days of preparation time. Jarvis gets a machete, Strode gets her shotgun and whatever traps she sets up during her preparation time, the janitor gets his bare hands, and Hanson gets whatever traps she sets up during her preparation time. Cordell gets a shotgun. The fight takes place in a large and dark forest.