we have 54 new pokemons already. I just dont believe that we will get less than 100 pokemons
we will get at least
3 more legendaries
Morelull evo or evos
Pyukumuku evo or evos
Minior evo
Comfey evo (if it has one or two)
Wimpod evo
Salandit evo
Rimombee evo (if it has one and actually it should

)
Bruxish and Drampa pre-evo
Pikipek evos
Komala evo
Starter evos (3 new pokemons)
That makes it already max 21 new pokemons min 15 new pokemons. That makes it 75 new pokemons. And we are still waiting for that Snowman pokemon and Dolphin right. I think there is still a lot to reveal.