Alright folks, it's leak time. Here's what I've been told.

-119 new pokemon + 31 Alola forms
-Only 15-16 new Mega evolutions are featured. They all come from Gen 2
-There used to be a monarchy in Alola. Lillie is a direct descendant of the royal family. She has a major role in the plot
-The boat appearing in the map comes from a different region, its captain will be challenged at some point
-Marshadow resembles a scorpion
-Next trailer footage is related to the three starters
-Fossils are a plant and a moray
-Most pokemon introduced are Water type
-The three starters are Archer, Wrestler and Siren, with slightly improved design
-One of the Tapu resembles a frog
-Legendary trio related to outer space
-Anemone pokemon found all across the water zones
-Tapus are worshipped by most of the people. Except for a small group
After main plot, the game focuses on Zygarde...
-Fire type legendary pokemon thought to have brought up the four island from the sea

There will be a lot of rain