We’ve recently figured out (via NeoGAF) that XSEED have registered the domain FateExtella.com, which shares the same name with the recently announced Fate/Extella game being developed by Marvelous.
This most likely means that XSEED will be localizing the game for the North American region but with the domain only being registered a couple of days ago, it might be a while before we hear any formal announcement from the company.
Fate/Extella is set to release in Japan sometime this year for the PS4 and PS Vita.