That's pretty much what happened yesterday when a supposed Justice tack from Ed Banger Records Volume III "leaked" onto the internet. The track was called Hope. Was that a intentional name by whoever started the rumor?
Less than 24 hours later, it is corrected as a song from the soundtrack of a Japanese manga show Kaiji. The track is Espoire named after the lead character's space ship. If it were indeed a Justice track it would have been interesting change for them. The track is heavy on the guitars and seemingly would echo Daft Punk's Human After All change to a more rock orientated sound.
Anyways, if you do like the music, the soundtrack is available import only for something around 35-50 bucks. Track 14 is the track in this video that was confused for the Justice track.
Anyways, the point is I'M GOING TO JAPAN! Wooo! It seems like end of April is my target date.