sorry to be the asshole, but i'd be VERY surprised if anyone found a true leitmotif within a piece of music as simple as a song from a game. say what you want, but for goodness sake, we're talking one or two motivic ideas that are the most important from a 5-hour long opera, not just a standard motif as we know it. it's a 'lead' motif - the most important and relevant motifs over the course of a massive piece of music. there's like seven in the entire ring cycle, and that's 12 hours of opera, for goodness sake.
that wiki article definition is wrong - it's the definition for motif, not leitmotif.
you should probably fix your work from leitmotif to just motif, there's a HUGE difference.