>>27482105That's probably not right. Today's info states that each island has a totem and a kahuna, with kahuna fights coming after totems and kahuna fight is the end trial of each island.
The Totems and Kahunas will likely each be a 'gym leader' boss battle, one of each per island, 4 islands, for a total 8 'gym leader' boss fights just like previous games. But it's early, and maybe there's more that hasn't been revealed yet.
So the second 'gym leader' has 3 pokemon, and going by
>>27482259 this seems right on track.