In the world of anime, the announcement of upcoming installments often creates much anticipation, generating excitement among fans. However, sometimes these announcements can be forgotten for many years, leaving fans in the dark about what has happened.
Below are some anime that have announced their next installments but have not returned:
Mahou Shoujo Lyrical Nanoha Shin Project

Announced in January 2020, the new project “Mahou Shoujo Lyrical Nanoha” has left fans waiting without any updates. This franchise is known for its complexity in storytelling and character development, which may contribute to the extended waiting period.
Zombieland Saga The Movie

The announcement for the “Zombieland Saga” movie in June 2021 excited many fans, but three years later, no further news has been released. The anime is often known for its long production times and careful planning, which may explain the current delay.
Youjo Senki Season 2

Youjo Senki announced its second season in June 2021, but since then, there has been complete silence. The series has a loyal fan base but faces pressure from the audience, which may be a reason for the show’s ongoing delays.
Fate/kaleid Liner Prisma Illya Zoku-hen

The sequel to the popular “Fate” series was announced in August 2021. However, three years later, fans are still waiting. The Fate franchise is known for its many adaptations, which may complicate the production timeline.
SK8 The Infinity Season 2

The announcement for the second season of “SK8 The Infinity” was warmly received in August 2022. However, for the next two years, there have been no further updates. Sports anime often have complex production processes that may affect timelines.
Sono Bisque Doll wa Koi wo Suru Season 2

The second season of “Sono Bisque Doll wa Koi wo Suru” has also left fans intrigued. The series quickly gained popularity, which could lead to a significant announcement in the future.
Trapped in a Dating Sim: The World of Otome Games is Tough for Mobs Season 2

The announcement for the second season of this series in December 2022 has yet to show clear progress. Adaptations from light novels may face specific challenges in the transition process, which could delay production.
Lycoris Recoil Shin Saku Anime

“Lycoris Recoil” announced a new anime project in February 2023, but since then, there have been no further details released. The original series was successful, and the production team may be working to maintain quality for the next installment.
To Your Eternity Season 3

Season three of “Fumetsu no Anata e” was announced in March 2023, but fans are still eagerly awaiting news. The series is renowned for its emotional storytelling, which may require additional time for production.
Tantei wa Mou, Shindeiru. Season 2

The second season of “Tantei wa Mou, Shindeiru.” was announced in July 2023, but to date, there have been no updates. The series combines elements of mystery and action, which could complicate the production process.
The ongoing debate about the announcements of sequels that have not materialized over the years can be frustrating for fans who are eagerly awaiting news. Early announcements can build anticipation and maintain interest, but they can also lead to disappointment if delays continue.