Earth has regained peace but is attacked by a new enemy with space-time powers. Musashi, Cosmos' host tells the UPG that the Ultra Warriors along with his Ultra, Ultraman Cosmos, have been sealed inside an evil space-time castle by a warrior woman named Arina. The fate of the entire world will be at stake.
- Other name: 劇場版 ウルトラマンギンガS 決戦！ウルトラ10勇士
- Genre: Action, Drama, Tokusatsu
- Status: Completed
- Duration: N/A min
- Country: Japanese
- Network: N/A