>Johto' starters will not get an Alolan form neither a Z-move
> Tyranitar will get a Z move
> Girafarig and Skarmory will get an Alolan form
> Noctowl will get an Alolan form and gets the ice type
> In their Alolan forms Magmortar and Electivire will switch their types
> トゲピ will get a Z move
> Mareep, ソーナンス , Okutan and ミルタンク will get their alolan form

>return of the megas
>red and green will have a major part in the plot
> Pokemons will follow the trainer in the overworld
>national pokèdex

Also Necrozma will attach to Solgaleo and Lunaala with his purism armor ability

Togedemaru is the steel-type totem pokèmon
Mimikyu will be the ghost-type totem pokèmon but i different circumstances from last games

end game with gyms and a new ultra universe

>some pokemons will get "ultra moves"
>you will get your starter in different circumstances
>cosmog does not appear in the first half of the game