Theory concerning a secret trophy

[DarkFairy]

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The ''The Battle to End All'' trophy's description is really making me ponder. Normally you get the final fight trophy for beating the final boss but this trophy specifically says start the battle with MX. What I think this means is we won't actually beat Master Xehanort. Maybe someone of his own ranks will betray him? What do you guys think. I'm sorry if this has been brought up before.

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[lux_crusader]

There’s another trophy for beating the game, I’d imagine that’s the one for finishing the fight

 

[ZJGamer]

I think the "Start the Final Battle Trophy" is probably achieved after you complete the Keyblade Graveyard segment and then Scala ad Caelum becomes unlocked. When you approach the area of the final battle you probably receive this trophy. The "Another Chapter Closed" trophy is obviously achieved after defeating the final boss, whether that be Master Xehanort or not.