Quote Originally Posted by Wolf Kanno View Post
He also used the same bass line for the first six battle themes in the series if memory serves me correctly.
He did, and it's also in the final battle in Final Fantasy VIII and in the battle theme for Final Fantasy IX (the latter is the most likely to be intentional, of course, as Final Fantasy IX is basically the nostalgia Final Fantasy, but it's awesome, in my opinion, if they all were intentional.)

I genuinely love it when songs sound similar, so this whole thing is awesome, however it happened. Though it is likely on purpose (and awesome that it is), as it has likely happened before (there's definitely some "Wipeout" trying to get in, during Final Fantasy VII's Chocobo battle music...)