So I just heard there's a Kill La Kill game in the works called Kill La Kill The Game: If. It's an alternate story that diverges from the anime with Satsuki as the main heroine instead of Ryuko (though she's playable too), and the gameplay is heavily inspired by Guilty Gear and other ArcSys fighters. Interview here and trailer here.
I think it looks really cool, though I hope they don't make it a pure fighting game. While a big highlight of a Kill La Kill game would obviously be participating in all the balls-to-the-wall fights, it'd also be fun to just play as Ryuko riding around Honno City on her motorcycle, interacting with all the quirky locals, discovering things and picking fights with the local toughs.
The anime created a wonderfully detailed and zany world, so I hope the game gives us a chance to actually explore it, rather than just making it a string of setpieces from one badass fight scene to another.