Marvelous AQL published Fate/Extra CCC in Japan and they’re borrowing Saber’s virgin bride costume for one of their key series. Valhalla Knights 3 will have crossover costumes for Saber and Caster. These items will be released as a free download on June 6.
Valhalla Knights 3 comes out on Thursday in Japan. Xseed will release the game in the North America, but haven’t said anything about any crossover content. As of now, Fate/Extra CCC has not been announced for the West.