my theory is that the keyblade war isnt between other keybladers just a whole bunch of kebladers fighting heartless because if you watch the secret ending there is a thing in the background that fades away it had spikes and look like a lizard type heartless so it had to be a heartless.
yea it could be true, but there are many thoeries if you put it in different angles, the could have been fighting heartless, or they could have been agianst them. right the thing that dissapeared in the backround could be a heartless. but, why did all the keyblades whould make a perfect 4-way? and if there was a keblade war, don't ya think that there bodies whould be next to them?
i think that alternate ending is probably just a big teaser leaving you knowing nothing untill the way end of kh3...