Squares interests arent to appeal to people outside of Japan, there just happy with the sum of money they recieved. They've already got a solid fanbase outside of Japan, who predominately own Sony's consoles.

What Microsoft want out of this is to make the 360 more popular in Japan. Which I doubt as previous JRPG's released on the 360 havent made an overall impact. Maybe a slight spike in sales but thats it.