Bruce did not choose to leave Gotham.
Although he had learned from Jack that there were more cities in the dream than just Gotham, and that going to other cities to develop, gaining plenty of resources, and then returning to Gotham to compete would be a good approach, Bruce was not inclined to do that.
The Batman of the Primary Universe seemed to be planning to go down this path. Bruce could understand his thought process. For all these years, Batman must have tried countless methods to change the situation in Gotham, but he never succeeded. Even a fool should realize that there's something fundamentally wrong with this city on a higher level.
Batman, having exhausted his life's efforts, failed to ascertain the root of these problems. The Joker may know, but he also cannot say, and other people are either not familiar enough with Batman or not familiar enough with Gotham to be of any help.
Batman seems to be constantly searching for potential cracks in the wall at the end of a dead end, but unfortunately, the problem is of a higher level than he had imagined. The story of the Primary Universe cannot conclude, so Gotham can't possibly be saved.
But now, Batman may also have learned through some intelligence that Gotham in the Kingdom of Dreams is not affected by this strange issue, which means the wall that has always blocked him has disappeared, and he finally has the potential to save Gotham.
Bruce knows how eager the Batman of the Primary Universe must be. If he chooses to walk the same path as Batman, he can only follow behind him. The first person to make Gotham better is the savior, the second one is in vain. There is no benefit to following in the footsteps of the Batman of the Primary Universe.
After Jack left, Bruce didn't hurry to find a method that surpasses the Batman of the Primary Universe. He is now contemplating a very important question - is Jack really so kind-hearted?
Of course, they are friends now, and their relationship is not bad, but Jack is after all the Joker, and the Joker's top priority in his behavior pattern is to mess with Batman.
Help Batman? That only happens in dreams or when Batman is about to die.
Jack's reminder this time doesn't fit the Joker's mode of action at all. Isn't it more fun to see Batman failing a test disastrously?
All this time, Bruce's psychology hasn't improved much, but his understanding of the Joker's psychology has greatly improved, and he has basically figured out the Joker's behavior pattern.
Once the Joker's behavior deviates from the logic, it implies that there is some conspiracy concealed behind it. What could it be?
Bruce started reasoning from the beginning.
When Jack first found him and explained the situation of this world, his words were what he had previously said: "I built a Gotham in the Kingdom of Dreams."
Bruce was indeed misled by him because he didn't know what kind of authority Jack had in the Kingdom of Dreams. He thought that Constantine, who might be responsible for managing the Kingdom of Dreams, had given Jack some jurisdiction. Based on this understanding, Jack's project could not have been very big, so Bruce thought that Gotham was the entire map.
But now Jack told him that the map could be even larger than a whole Earth, proofing that Jack's authority in the Kingdom of Dreams is amazingly great, and even with such authority, it must have taken a long time to build such a large map.
If this is something he and Shiller have been planning for a long time, then is it just a language trap?
This is not in line with the Joker's style.
First law of understanding the Joker - there is never a correct answer to the multiple-choice questions given by the Joker.
Second law of understanding the Joker - if the Joker lets the test taker think that a certain answer is correct, then that answer is likely the most absurd of all the answers.
Jack first implied to Bruce verbally that there was only Gotham on the map, but just before Bruce was about to answer the question incorrectly, he came over to remind him that the answer he had chosen was incorrect.
So what answer is Jack hinting is the correct one?
Bruce ran all the conversations he had with Jack through his mind again, and then sharply noticed something wrong. Jack finally said that Bruce knew the answer that could make Shiller give him a perfect score.
Could this be another language trap?
Bruce's detective intuition told him it was, and from this point on, this sentence was actually guiding Bruce, implying that he should go find the answer that could make Shiller give him a perfect score.
So what is wrong with this?
Bruce frowned, clutching the pen tightly in his hand, his brain working rapidly.
No, the answer may still be found in Jack's words and actions, so where is it not right?
Suddenly, Bruce was taken aback, a flash of inspiration struck his mind. Indeed, the laws of understanding the Joker he had summarised were correct, Jack did not have such good intentions, and there was a more dire trap behind this.
In the reception room of the manor, Shiller laid the newspaper flat on the coffee table, put down the steaming tea in his hand, took the orange that Aisha couldn't peel from her hand. Huddled on the single sofa next to him, Helen asked while biting a pear,
"Isn't it inevitable to misinterpret some meanings due to spoken directives? It would be so exhausting to be vigilant all the time."
"Besides, it's quite remarkable to be able to swim like a fish in the waters of the Gang System. If you hadn't brought me back, I might be dead on the streets by now."