[quote=@Sadu]
Is alice going to remain a Princess of Light after everything that is going to happen in Wonderland?

Also we can say that each Princess must be granted the blessing from a ruler with Royal Authority. But the remaining six rulers must all unanimously grant their blessing to the magus themself.
[/quote]

I think after each Princess was found by the forces of darkness they'd decide to pass on the light as in canon to make sure it can't be found so easily again.

The only issue I see is the Villain plan for Kingdom Hearts 1. With them being aware of Royal Authority and what it is and does they'd know that just gathering the 7 Princesses wouldn't be enough to get them to Kingdom Hearts. Let's say having approval of every one with Authority is the final key to the Door to Darkness. They'd know they wouldn't be able to access it. So what would be the point if they weren't also kidnapping the Royals?

What about this? Instead of Royal Authority being granted to open Kingdom Hearts it's instead what grants someone, for example a Magus, the ability to control Kingdom Hearts. The Princesses are the key. The Royal Authority is the Master Control and it makes sense with it being Royal Authority. So Xehanort believes with his current body and abilities all he needs is the 7 Hearts of Light and he's all set and doesn't need the remaining 12.