is it known if there will be a official soundtrack release for this game? I can't find any info about it only Game Rips.

The official soundtrack wont be for months. The first platinum collection wasn't a feature from Club Nintendo for at least two months after the game's release.

Yeah, but I'm pretty confident they'll release an OST like they did with the first game.

Official soundtrack announced for Club Nintendo Japan (http://gonintendo.com/viewstory.php?id=124808)