So...Here's how this is gonna work...You have 5 choices. (I'm feeling creative today.)
1. Go with the Destiny Islands Trio.
2. Go with Bri and Lea to get Roxas and Xion back.
3. Help Serena sneak out of the tower to check on me.
4. Go after Xehanort/Orginization 13 yourself.
5. Do your own thing.
Put the number you want to do in the comments. Have fun!
Let's say the Wayfinder Trio are safe and sound in these scenarios. In other words, they were rescued already. So we don't need to save them.