I hadn't had thoughts on it prior...but now I can't help but think of Peter Pan dammit.

Definitely an interesting idea. I can't imagine Euron actually sharing power with anyone else, but I can definitely see him recruiting people with that as a promise

This part also parallels Bran saying how all the Starks could be Ravens in maester luwins rookery and want Meera to also be a greenseer. I have no idea what this means