Scarecrow entered into a hospital and called Bane.
Scarecrow,"hello... steroid.. come into the hospital...it's safe and it's time"
Bane laughed
Two face and joker split themselves into individual hospital rooms and planted a dirty bomb...
Joker and two face came out With a smile.
"Slice and dice"joker smiled.

Clown dressed himself as a nurse and mixed up with the people in hospital.
Penguin with his umbrella standing at another building's top waiting for some signal.

The hospital is highly placed at the mid of Gotham.During that time,many government higher officials were present.Jim Gordon was also one among them.
"So that's the plan.."joker said
Clown,"What you are gonna blow all the heads..it's cruel..it's awesome.."
Joker,"Alongside I have planned for a robbery on all Gotham banks during this attack..."
Clown,"so all the super villains are diverted to attack the hospital and we gonna utilize the situation"
Joker,"double... bubble"
Clown,"so these super morons and batman are gonna fell in the pity pit..he-he"

Doctor strange heard their conversation...
"Omg...there is a plan running over this hospital... Strange joke ever" he
Started moving outside with quick run.