Please, please find another way to hook the audience. I know it seems like a good idea. But every single goddamn JRPG, we cut ahead so that we can see our protagonist being all dramatic and then it barely comes up until 20 hours later you're like "oh hey it's that scene from the flash-forward" and then all narrative flow has been lost
It's not even something specific, like the end of the game! It's always some arbitrary midpoint with no context. There's still another 40 hours after the big flash-forward moment. It means nothing!