Despite the limited information available on the possibility of "Attack on Titan" season 2, fans of the series still have something to look forward to.

According to sources, "Attack on Titan: No Regrets, Birth of Levi" might be expected to be released by December 9 of this year. Earlier reports revealed that the "Attack on Titan: No Regrets, Birth of Levi" will be a spin-off of the highly popular anime "Attack on Titan".

In an article by Scott Green from Crunchyroll, the "Attack on Titan: No Regrets, Birth of Levi" has been verified to be released as the Volume 15 and Volume 16 issues of the famous manga. Volume 15 will be supposedly available by December 9 of this year while Volume 16 will be released on April 2015.

However, fans are given the clarification that the "Attack on Titan: No Regrets, Birth of Levi" will be a distinct story from the "Attack on Titan". Hence, the rumored Volume 15 and Volume 16 of this series will be focused on the purported spin-off plot.

Nonetheless, "Attack on Titan: No Regrets, Birth of Levi" will be regarded as a prequel to the primary plot of "Attack on Titan". The noticeable difference between these stories involves the characters.

In "Attack on Titan: No Regrets, Birth of Levi", the story will bring into the spotlight the background and details of Levi compared with the "Attack on Titan", which focuses more on the lives of Eren and Mikasa.

To further bolster the authenticity of releasing "Attack on Titan: No Regrets, Birth of Levi", the anime illustrators actually shared several remarkable illustrations on their Twitter accounts. The drawings were created to provide fans a glimpse of what to expect from the highly anticipated spin-off.