Here is a message from producer Yuito Kimura on the delay:

Regarding the Update to the Release Date

The development team has been hard at work getting Granblue Fantasy: Relink ready for its target release date in 2022. We understand the excitement players have for this game, so it is with utmost regret that we announce that the release date will be pushed back a second time to 2023.

Although internal and external circumstances pertaining to the novel coronavirus have been the primary hindrance to the development process, the entire staff has spared no effort in pushing to make up for lost time. However, considering the large-scale scope of this title, we believe more time is needed to further polish and optimize details and gameplay as we approach the final stretch.

All graphical resources, scenario pieces, voices, music, and other assets are in a completed state. At this stage, we are focused on refining gameplay balance, debugging, improving audio and graphical fidelity, and making general improvements to the overall experience. We would like to ask for a little more of your patience.

Further information was slated to be revealed in June 2022, but at the moment, our plan is to share more details in December 2022. We can’t wait to show you what we have!

—Producer Yuito Kimura

If you missed it back in December 2021, catch up on the latest information and footage here.

Watch a short new video with the updated release window below.

The release date for Relink has been changed, with details posted to the official website. We sincerely apologize to everyone excited for Relink.https://t.co/i67yCmjkAJ

Please stay tuned for further updates in 2022!#RELINK pic.twitter.com/rNsEO17ggR

— グランブルーファンタジー リリンク (@gbf_relink_jp) June 10, 2022