Why are people considering that Kukui would be taking part in the League as Masked Royal?
He is the League Organizer, isn't it.
Normally those who are in the organizing committee don't take part in event they are organizing (as it is considered as unfair).
At most, i think he would do a Exhibition Battle (as Masked Royal), against the Winner, or against one of the Kahuna's who are in the organizing committee.
On a different note, i wonder how fast we would go down from 151 (probably a reference to 1st Gen), to 16 Trainers?
Would it be done in a single episode, or would it take 2-3 episodes.
Also, since 'Battle Royal' is being mentioned in the title, does it mean we would have 4 vs 4 trainer battles?
And, don't forget, we need a League Winner, who haven't been a reoccurring cast member.
So, i guess Ilima would probably take part and win the League (since he is a pretty boy, and an all-rounder).