when I was first reading Japanese impressions of Crisis Core (when I still hung around NeoGAF), I was impressed by the described final battle - similar to FF7 and FFX, it wasn't really the final boss (who was Gackt, or a clone of Gackt, or a clone of a clone of Gackt - ugh, what a story). Rather, the final fight was Zack against the Shinra soldiers who were sent to take him down after he escaped Neflibhbdrliwhatsit with Cloud in tow. This was somewhat vaguely portrayed in the original FF7, and Last Order (the anime short meant to link Before Crisis and Crisis Core) basically made a hash of the sequence of events (and what happened in the big Zack/Cloud/Sephiroth showdown in Neifelbadgersheim).
Crisis Core, which of course is entirely about Zack and his interactions with Cloud and Sephiroth, further revised things - for example, Last Order implied that Zack died from a sniper shot during a truck ride briefly shown in the original FF7. Crisis Core altered the scene to have him survive, only to end up facing an insurmountable legion of Shinra soldiers soon after. Leaving Cloud in a safe location, he then fights a desperate battle to the death against odds that can't be defeated. This is portrayed via the game's battle system, and when I was reading the descriptions given by someone who had just finished the Japanese version, I apparently got a very incorrect image of what happened.
My mental picture was of a combat scene in which Zack is surrounded by Shinra soldiers who he is powerful enough to cut through like butter, but no matter how many he defeats, more step up - it's practically a small army. No matter how powerful or resourceful the player, they will eventually die, because Shinra is powerful and amoral enough to just throw men's lives away until Zack is dead. To me, this was a powerful expression of plot through gameplay and the nice take on the annoying concept of unwinnable RPG battles.
I had thought Those Who Accept The Protection of the Stars the last "true" boss theme., given it's sheer nosiness and the disparity between it and the next track, Soldier Battle. I mean, I imagine some of you really don't hear much difference between Ishimotos rather inelegant rock battle themes, but that drum-roll style opening and the oppressive/repetitive nature of the tune made it seem like the perfect fit for a battle the player either knows or gradually realizes they are going to lose no matter how hard they try. I got into my head somehow that this battle took place in the middle of the night with a full moon shining down on the bloodshed as this tune droned on.
And it's called Soldier Battle, after all.
....except of course, today I decided to actually look up the scene (since I'm pretty sure I'll never play the game), and eventually I realized something: despite how I remember seeing it on tracklists back then and how it's listed on Youtube now, it's not Soldier Battle. It's SOLDIER Battle, an important distinction those who've played FF7 will recognize. The song actually pays when you defeat the villain's giant ridiculous final boss from, and then have a one-on-one final battle with him while he is back to being Gackt. That is the game's "true" final battle.
Suffice it to say, seeing the actual hopeless battle against the Shinra soldiers disappointed me, not just because it was nothing like I had erroneously imagined it to be, but because it just plain looks moronic. (the music,by the way, is The Price of Freedom, which I had assumed was some ending FMV track)
tl;dr: Never expect a Final Fantasy game to be as good as you hoped