This is a crazy idea here, and I'm sure you're probably done with this hack, but hear me out. What if you made the game skip the team up cutscenes all together, and made it so you had all four characters right from the start. You might have to implement a menu, but it's totally possible. I know optomon was able to do something like that when we were working on CV3. To take it a step further, I bet there could be a way that you can make the game pick which ending it shows based off of who you are playing as when you beat the game. Just throwing it out there.