This reminds me of something I have wondered since first watching the opening cutscene.
What does Xehanort see in the sky before placing his first piece on the chess board? To me, it looks like it could be a heart, though not sure. If it were, whose heart would it be?
Whatever it is, it seems to compel Xehanort to make his first move. I guess this could be a representation of what happens with the MoM
In hindsight, now looking at this:
The first thing that comes to mind, is this: