Ok, we've had this thread a few times before, but I'd like to put my own spin on it.
Mass murder in Gotham park! The Joker thought to be responsible for the deaths of over 30 Gotham citizens. Police are on a city wide manhunt for the lunatic, if any information on this man's whereabouts is known please contact the Gotham City Police Department as soon as possible.
Basically, Frank's had enough of this bullsh*t. Off with his shotgun, it's time to punish those who have made Gotham City a living hell.
The Joker is located somewhere in Gotham City. He's recieved a tip that Frank Castle is on the hunt for him; what the Joker does with that information is up to him.
Meanwhile, Castle is aware he's been ratted out and made short work of the snitch (he was a serial killer anyway). It is his mission to 1. find the Joker, and 2. "punish" him, if ya know what I mean. Oh, and one more thing,
this guy is in on the party too. His info is a bit more limited than Joker's (someone is after the Joker, that's all he knows) but he's prepping all the same.
-Frank Castle is looking for Joker
-Joker is hiding and preparing
-The snitch has been killed, so no more info can be leaked, unless someone else somehow manages to figure out what's going on (Joker goon maybe) and spreads the word
-Batman is aware of the X over Joker's face, but that is all he knows
-Batman's parents are dead
How does this scenario unfold?