My take on how will the next chapter of bsd will start. Theories and small predictions on who will appear. PART 1
Analysis on the last chapter (before and after Atsushi went to London)
When Atsushi visited the airport in ruins, Kyoka founded a ripped part of the book's page. Atsushi thinking the Special Division mightve missed it wanted to give it back. And then Atsushi was transported in London when he touched it.
Judging from the architecture, the designs of the clothes, and transports are all on 19th century (somwhere in the early 19s maybe)
Theory #1: In my opinion, I think Atsushi genuinely has been asleep in the street for like a few hours or few minutes, but you may ask why did nobody wake Atsushi up? Good question. I think It's because of the British and Japan's relationship back then. Briton had little direct contacts with the Japanese since the Japanese had this strict rule which is called "Sakoku"
With that maybe they mightve never seen a Japanese person in like.. Real life, and Atsushi is just sleeping in the road. Probably muttering something about in Japanese which they don't understand. Until that old man woke him up. Because wdym a random Asian teenager boy suddenly appeared in the street??? That's so strange.
Theory #2: The reason why Atsushi can understand English is probably because of the book, or the person who said "Oh tiger, oh tiger, meet at the promise land." this is probably the voice of the author of the book OR the book itself.
Theory #3: Atsushi will definitely meet the Sherlock Holmes. Sherlock Holmes was created somehwee in the early 19s in London. And I think they will meet when Atsushi somehow solved a case on his own using modern knowledge. Another case, is Atsushi meeting Holmes when he is chasing Moriarty. Atsushi accidentally bumping into Holmes and he gets scolded by him. And Atsushi offered to help him.
Theory #4: I think the plot of PART II of bsd will resolve around Atsushi trying to coming back home with a few chapter resolving around the ADA trying to prove their innocence while also trying to find what happened to Atsushi.
Another scenario might be Atsushi trying to find out what kind of connection he has with the book.
Theory #5: For the first few arcs I think Atsushi would work with Homles and Dr. Watson. With Moriarty as the antagonist, and after a few arcs Moriarty will be a temporarily ally (like the Port mafia). And finally the main antagonist will be Agatha!!!