1. master is light's avatar, just like Darkness has an avatar that can act ... my theory master is light, light = sora

2. ventus killed strelitzia (marluxia(lauriam)'s sister) while controlled by Darkness (the avatar), it shape shifted into Ava to fool him

3. vanitas is important in some way

4. the master is trying to assemble some great force of powerful heroes (yozora, sora) supporting this is the fact that yozora and sora ended up at the exact place the master wanted them when they were both banished from their worlds, and yozora was told to save sora

5. the master revealed there is a way for sure to defeat the darkness (not a stalemate) and that it will take many lifetimes and very careful planning

6. the pod kairi is in during the Melody of mem trailer is used to go to different worlds, past and future
7. the avatar of Darkness knows the contents of the Book of proph. up to some point, not all of it

8. what ever is in the box WILL bring the master back

9. im still unsure if the master's intentions are evil, and nomura is making extra sure that we cannot figure it out just from what he says, he claims that he will "leave this world", "destroy this world", and more to achieve his victory against the darkness