that  what was written in famitsu magazine :

Marvelous has a new Wii horror adventure game on the way for release on March 24. The game has Balance Board support.

In Japanese, the game's name is written "イケニエノヨル." I'm not sure what this is supposed to be in English -- it's sounded out as "Ikenienoyoru."

http://www.andriasang.com/e/blog/2010/12/08/flying_get/

Could be awesome, depends on the art style and the horror effects.

Horror adventure, great! According to some comments in Adriasang, a loose translation of the game's name would be "Night of the Sacrificed/Scapegoat".

Does anyone know whether Marvelous have any similar games in their past? Just trying to figure out what it may look like (they can't use the LKS kiddie look for this one ).

balance board in a horror game?

they didnt develope LKS they were just the publisher

Ok, so what did they actually develop? (also, maybe they haven't developed this game either but are publishing it?)

No, they did actually co-develop LKS with Cing and Town Factory.   MMV usually just acts as a publisher though, but they make the Harvest Moon games inhouse (with Natsume and TOSE Software sometimes helping out).

I doubt they're making this game themselves though.  More likely it's 100% external like No More Heroes (Grasshopper Manufacture), Rune Factory (Neverland), Muramasa (Vanillaware), Luminous Arc (imageepoch), Half-Minute Hero (Opus) or various other titles.

First video and some screens

Using the Balance Board is a strange idea... But I'm curious to see now.