While we are all impatiently waiting for "Attack on Titan" Season 2, Wit Studios has yet to announce a release date of the new season. According to reports, development of "Attack on Titan" Season 2 will not begin until the release of Volume 15 later this winter. This means that the upcoming season will not air until as late as August 2015.

Back in August, we reported that "Attack on Titan" editor Shintaro Kawakubo revealed the timeline of the manga during a rare interview conducted with the University of Tokyo Newspaper. According to Kawakubo, the manga will be complete in just about three to four years. In the interview, Kawakubo announced that the writers now have a clear blueprint of the "Attack on Titan" story arc, its mysteries, and its characters.

“The serialization is slated to end in three to four years, but 'Attack on Titan' is a work that will be passed down from generation to generation for a decade -- no, five decades,” said Kawakubo. Since the "Attack on Titan" manga debuted in 2009, more than 36 million print copies have been sold.

Here's what we know so far: the "Attack on Titan" manga currently has 14 volumes, while the 15th volume will arrive before the end of the year. Since its debut in 2010, "Attack on Titan" has consistently delivered 3 new volumes per year. Should "Attack on Titan" end in 3 years, or 2017, then there will be a total of 24 volumes of the manga. If the "Attack on Titan" manga ends in 4 years, or in 2018, then we expect a total of 27 volumes.

A total of 25 episodes in "Attack on Titan" Season 1 covered about eight and a half volumes of the manga. If the "Attack on Titan" manga delivers a total of 24 volumes, then expect three solid seasons of the "Attack on Titan" anime. That said, the story will no doubt continue to evolve, which will mean the anime will require a lot more episodes in order to deliver a story that truly honors the manga. What's more, if the "Attack on Titan" manga takes until 2018 to complete, we are confident that the anime will stretch into four seasons as well. Finally, given that the first "Attack on Titan" season has a total of 25 episodes, we assume the "Attack on Titan" anime will end somewhere in between 75 to 100 episodes.

Beyond the main "Attack on Titan" anime, Wit Studio has announced a special "Attack on Titan" spin-off prequel titled "No Regrets, Birth of Levi." The "Attack on Titan" spin-off anime will release on Dec. 9, coinciding with the release of "Attack on Titan" Volume 15 manga.

Two epic "Attack on Titan" movies are in the work as well. The first "Attack on Titan" movie release date is summer 2015 and sources have already confirmed that there will definitely be a sequel. The cast selected for the "Attack on Titan" movie include Haruma Miura (Gokusen), Hiroki Hasegawa (the upcoming live-action Jellyfish Princess, Why Don't You Play in Hell), Kiko Mizuhara (Norwegian Wood, Helter Skelter), Kanata Hongō (Prince of Tennis, Nana 2), Takahiro Miura (live-action Space Battleship Yamato), Nanami Sakuraba (Twin Spica), Satoru Matsuo (Thermae Romae), Satomi Ishihara (No Longer Human, Sadako 3D), Pierre Taki (Linda Linda Linda), Jun Kunimura (Audition, Kill Bill), Shu Watanabe (Kamen Rider OOO), Ayame Misaki (Tokumei Sentai Go-Busters), and Rina Takeda (High Kick Girl).