That interview emphasises the possibility of the "related" characters being both Xigbar and Xemnas/Xehanorts Heartless/
. But the fact that Final Fantasy XII was released only recently and that Kingdom Hearts III will most likely feature new Final Fantasy characters suggests to me that the man with a smashed helmet will be Gabranth. The resemblance is uncanny, to say the least. Pay close attention to Gabranth and the man - their hair is the same and their eyes are both blue.
Then again, I could be talking a load of crap xD We'll just have to wait and see.
Riku
Then again, I could be talking a load of crap xD We'll just have to wait and see.