No one is paying me for this, so you're free to believe me or not.
Take screenshots to verify later, if you want.
Excuse me for eventual bad english:

-Starters' leak are almost true, real designs are slighty different. We just seen preparing drafts. Luchalitten real design is fat, and it was posted on vp 2 times. Few noticed.

-Startes' mid evo can hold a z-stone with the same effects of the Munchlax's one. Snorlactium Z.

-Jangmo-o is the pseudo. Final stage will be Dragon-Fighting.

-A Grass-Drak mon similar to a lizard, maybe a crocodile. Not sure if Moon exclusive.

-Special Z-moves for Sinnoh starters. Infernape can turn into his Alolan form just like Greninja.

-Dragonite and Wigglttuff alolan forms.
Dragon-Water and Fairy-Fighting.

-Cynthia will appear in the ending

-Marshadow will be Ice-Toxic in Moon and Ice-Ghost in Sun. Not sure about Sun typing.