If the reports about "Attack on Titan" chapter 86 are anything to go by, more secrets about humanity and the Titans will be revealed in the continuation of Hajime Isayama's hit manga series.

In chapter 85 titled "Basement," Eren and the Survey Corps finally accessed the most mysterious part of the Yeager household. There, three journals were strategically concealed by Eren's father Grisha.

The first journal alone already contained a big revelation — that humanity exists and even thrives beyond the walls. This goes against everything that Eren and the others were made to live with.

Although this discovery is deemed as one of the most jaw-dropping moments in the manga, this is believed to be the first of many secrets that will be out in the open as Eren and company continue to examine the journals in "Attack on Titan" chapter 86.

As per speculations, another secret waiting to come out has to do with the history of the Titans and how they came to be. Grisha is said to have that knowledge about this as it was him who turned his own son into a Titan.

Being familiar with the process, Grisha seems to have known information that others do not. This is expected to be uncovered through his writings in "Attack on Titan" chapter 86, if not in future chapters of the popular manga.

One of the greatest mysteries in "Attack on Titan" is the existence of the Titans. All their life, the Survey Corps have been putting their lives on the line and watching their loved ones die fighting them, not knowing that everything they believed in was a lie.

In "Attack on Titan" chapter 86, precious details about the beasts will reportedly be divulged as well as information on the Coordinate which is also known as the Titan's Power. Grisha's books should shed light on the world's mysterious history altogether.

There are also reports suggesting that the journals will also expose something about Eren's identity, which will be most shocking to him.

"Attack on Titan" chapter 86 will prepare fans for more world-shattering revelations as the series inches closer to its end as what was has been suggested in the past by people behind the manga.