its starting to sound to me like the various gods people speak of are just sounds personified which eventually became devil fruits more or less. nika the sun god with the sound of the drums of liberation and now zaza the rain god with the sound of falling rain there is also the forest god and i think the earth god. the people of elbaph and skypiea seem to both share an interest in calling things gods which makes me think we have been getting a closer look at what life was like in nikas time since the beginning.
also dragon totally has the zaza fruit. the whole storms appearing out of nowhere when he shows up thing proves as much. zaza being the thing celestial dragons fear most and dragon being the leader of the revolutionary army proves as much.
all that aside looks like its time for sanji and zoro prove themselves again gunko just being declared dead is interesting as well i wonder if its because shes trapped in ice or the result of imu controlling her body.