A teaser site with 80-hour countdown has launched at http://project-cosmos.jp. What fans quickly noticed was that, in addition to a registration from Marvelous, its source had a reference to the Fate/Extra game series.  

Marvelous published Image Epoch and Type-Moon's Fate/Extra RPG for the PSP in 2010, then Heaven's Feel-esque follow-up Extra CCC in 2014. The Fate/stay night alternate universe/spin-off might best be known for its introduction of its red-clad playable Saber.

1.現れた謎のサイトhttps://t.co/IEDE5gHQ5C

2.ソースにFateの礼呪

3.2010年に発売されたFate/EXTRAのサイトhttps://t.co/MHPWFCr3j2

電子の海で会いましょう。 pic.twitter.com/QXGWnA75zy

— たび (@mesotabi) March 12, 2016

Akiyuki Shinbo helmed a SHAFT-animated opening for the games

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Scott Green is editor and reporter for anime and manga at geek entertainment site Ain't It Cool News. Follow him on Twitter at @aicnanime.