The second season of Japanese anime series "Attack on Titan" is said to arrive sometime in 2016. Due to the long wait, numerous rumors and speculations become rampant.

"Attack on Titan" is based on the manga series "Shingeki no Kyojin" by Hajime Isayama. In its first season, the anime series covered 34 chapters of its source material, which translates to about four story arcs. According to the editor of Isayama, as reported by Design & Trend, the upcoming season is already 60 percent completed.

Since the manga series was only two story arcs ahead of the anime version, more time was needed to build more story lines. Season 2 of "Attack on Titan" may also be the last given that there are only about 27 more volumes left in the manga series.

While no storylines have been officially confirmed, it is believed that season 2 of "Attack on Titan" will take place after Titans have penetrated the Wall Rose. Captain Erwin Smith will not only fight off the Titans but will also lead an uprising set to overthrow their corrupt king.

However, Erwin and the 104th Trainees Squad will realize that the king was not actually the one in power; rather, it is the Reiss family that holds power and influence. Members of the Reiss family are said to have special abilities that allow them to transform into Titans.

The upcoming season may also delve into the true identities of Colossal Titan and Armored Titan. Their identities are linked closely to Eren Jaeger's past.

Finally, season 2 of "Attack on Titan" will also explore the identities of Ymir and Krista Lenz. Lenz is said to be the daughter of Rod Reiss.

With the rebellion being the focus of the upcoming season, it is likely that there will be several deaths. The most tragic loss may be Levi Ackerman, whose death is being speculated. His death may come after protecting the rest of the squad.

It is also rumored that Captain Erwin Smith may lose an arm in battle and will eventually leave the squad.

"Attack on Titan" season 2 will be released in Japan sometime in 2016.