I agree with thinking the song itself is going to be the ending credits song. I feel like a more upbeat version will be the opening but I don't think it will be too upbeat since this game is supposed to be the darker entry in the series.
At first when i did Terra's storyline it was hard cause i was playing on Critical mode and i had Zero exp ability on for 3 bosses but after that it was just difficult especially the Terra's armor vs. Terranort battle.
Yo i'm New here....but i'm not new to being apart of a KH Forum. I'm also apart of Kingomhearts3.org just thought i'd see how this forum is. So nice to meet you all.