system
Given the following post, respond as if you're commenting on Reddit:
human
[Arkham Knight] What if Scarecrow hadn't given Batman the second dose?

!!!!SPOILERS FOR BATMAN: ARKHAM KNIGHT!!!!


At the end of the main mission line, Scarecrow doses the captive Batman with Fear Toxin. This unleashes the Joker personality and it carries through back into Bruce's body with full control. Scarecrow doses Joker-Batman and the inner-fight allows Batman to regain control. 

What if Scarecrow had not given him the second dose? Thinking that Batman had to be insane with fear, he allowed him to sit and cackle like a madman. 

Red Hood still frees Joker-Batman like he did in the real game. Instead of Bruce, Gotham gets Joker fully in control of Batman's mind, body, assets, and connections. How screwed is Gotham?

It is entirely possible that Red Hood gets a bad feeling about giggling Bruce and let's Scarecrow wax him, but that scenario is not nearly as fun to speculate on.
gpt
Just like in Batman's hallucination, Gotham is going to be a playground for Joker's sick games until he gets bored and burns it to the ground.

The whole game is a showcase of how dangerous Batman is when he *isn't* willing to kill. Look at the obstacles he overcomes - *all* of Gotham's active supervillians are collaborating to wear him down; Gotham is occupied by a highly armed paramilitary force specifically trained and equipped to take him down; the streets are full of rioting thugs; the main leader of this paramilitary force is almost as dangerous as he is, knows all of Batman's secrets, knows how to counter all of his techniques, and has the loyalty of an army behind him. By the end of the night, the majority of his allies have at some point been captured, turned against him, or otherwise taken out of commission.

Batman retakes Gotham from all of the above, virtually singlehandedly, in a *single night*. Secure bases are effortlessly infiltrated. Armies of tanks are scrapped. Entire rooms full of soldiers are thrashed in brawls.  All without killing anyone or firing a single gun. Alert, armed patrols are strung up from gargoyles. 

Joker-Batman has all that skill, *plus* is willing to kill, use firearms, and abandon friends and allies.

Gotham will burn, without question. It's just a matter of how long until Joker-Batman puts the city of its misery.