Okay, picture this.
There are two factions. East and West. The first two chapters, you play one mission as each respectively.
Then from there on it's up to you to choose to play both sides; moving up the map, recruiting allies, advancing the storyline. But there are only a set number of allies to reach and levels to play. If you wanted to play as the east the whole time you'd eventually reach the west right where you left them. But they'd be leveled up to match your characters.
This way you could recruit allies at different times in the story but they'd be significantly stronger or weaker depending on when you reached them. A lowly level 5 thief in the west campaign would be a badass level 10 assassin if the east got him first.
You could meet the other faction at their home base with 20 allies while they are just 4 or 5 strong generals(not the class).
Or you could meet in the middle and have very balanced teams and then have to make a very difficult decision on who you want to win. This would be a very fire emblem-esque way to make you build relationships and connections to characters and then have to ultimately destroy them. I think it'd be very fun to play both sides and this would add huge replay value. Although I think it would take huge amounts of work to develop the different storyline branches. And to write a story that was flexible enough to explain why each faction makes different choices each playthrough.
Of course there would have to be some kind of post game after that. So you could see the world without the other factions influence.
What. Does everyone think of my idea?
