Aren't we getting a little ahead of ourselves? I mean Type-Moon is actually working on it as we speak, or will be working on it. Since this game is projected to be released sometime in 2009 if I remeber correctly. In any case this may be one of the the three Type-Moon projects that mirrormon may pick up if they are up to the task.
So in any case we have to wait for the game to be released to the masses in Japan first before they can work on this game now. Heck even I'm looking foward to it.