Or maybe this is 'The Gathering'.
Keyblade Masters have entered War across the worlds. Bringing forth Four who are to gather in the darkest of times. Prehaps this is a scene of War, an after-math, where countless have died, suffered painful deaths.
And before their deaths stabbed their blades into the ground, as some sort of sign.
Or, this is a long-dead place. Where war ravaged long ago.