I haven't completed the second game yet, so I'm not sure if the ending is the same or different (It will be very annoying if its the same as the first) but I was under the impression that it was possibly the last stages of the first final fantasy game, were Chaos created a time loop(cycles) so he could live forever. With the ff1 warriors of light being the ff characters trapped in the cycle with the WoL. So breaking the cycle represents the end of the ff1 game.

But there are too many holes in my theory so maybe not.