I'm interested in whether or not this can even be true. The heroes at Carteneau were sent into the time rift by Louisoix at the end of the battle. The alternate introduction is the player coming out of said time rift. If every character ever made was supposedly at Cartenau... shouldn't every character's story begin coming out of the rift?
Just to make sure I'm not reading it wrong - a more elaborate way to arrive at the same conclusion, yes?