At noon on June 24, 2025, the official news of the domestic souvenir game "Operation Delta" released, officially announcing the linkage tower defense mobile game "Ark of Tomorrow" and released the linkage trailer PV.

Linked PV:

Previously, Delta official posted a news post on Bilibili that this linkage was too abstract, but netizens still guessed the linkage object.

This official announcement did not release any other news, but was just a preview linkage.The official statement said that the content will be released together with the content of the new version when the new version is previewed on June 27.