Doubtful, but not impossible.
I have a feeling Pokemon will be rushed if it's out in 2018, considering Sun/Moon came out in 2016 and their second versions will come out in 2017.
This Pokemon game is going to be way more technically demanding than in the past. I say Spring 2019 is the most logical release period. I still see Metroid Prime 4 as a Summer 2019 release as well.
Lifetime Sales Predictions
Switch: 156 million (was 73, then 96, then 113 million, then 125 million, then 144 million, then 151 million)
PS5: 115 million (was 105 million) Xbox Series S/X: 48 million (was 60 million, then 67 million, then 57 million)
PS4: 120 mil (was 100 then 130 million, then 122 million) Xbox One: 51 mil (was 50 then 55 mil)
3DS: 75.5 mil (was 73, then 77 million)
"Let go your earthly tether, enter the void, empty and become wind." - Guru Laghima
