Official site is up:
http://www.gyakutensaiban-movie.com/
Also a weird video:
I don't have a clue what's going on here, but this is clearly something from 1-4, because you can see, yes, that's right:
Manfred von Karma!
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http://img.imgcake.com/leonpngpe.png
http://img.imgcake.com/squalloweenpngem.png