Pokemon leaks are good and all, but what's really worth knowing is all the new abilities and attacks, since those have an effect on the metagame. Gamefreak is clearly intent on shaking things up this time around, as shown by Oranguru, Passimian, Bruxish, and more.
Building on that, I've brought you this list of as-yet unrevealed abilities premiering in Sun/Moon.

>Shale Wings - Gives priority to Rock-type moves.
>Nail Wings - Gives priority to Steel-type moves.
>Rail Wings - Gives priority to Electric-type moves.
>Scale Wings - Gives priority to Dragon-type moves.
>Kale Wings - Gives priority to Grass-type moves.
>Trail Wings - Gives priority to Ground-type moves.
>Hail Wings - Gives priority to Ice-type moves.
>Whale Wings - Gives priority to Water-type moves.
>Tale Wings - Gives priority to Fairy-type moves.
>Frail Wings - Gives priority to Normal-type moves.
>Stale Wings - Gives priority to Poison-type moves.
>Pale Wings - Gives priority to Ghost-type moves.
>Assail Wings - Gives priority to Fighting-type moves.
>Snail Wings - Gives priority to Bug-type moves.
>Yale Wings - Gives priority to Psychic-type moves.
>Braille Wings - Gives priority to Dark-type moves.

Happy hunting.