I doubt there is a remake this gen. So far, Gamefreak has followed the pattern of every other gen having a remake so I'd expect it not be for another 5-6 years.Just realize Unova got four Paradox forms and a good portion of the dex belongs to it. It's coming. 12 years is due for a remake and judging how JN brought back so many Sinnoh characters hopefully we got one. Another Ash reset is confirmed.
Gen 4- GS remakes
Gen 6- RS remakes
Gen 8- DP remakes
So we can expect BW remakes in Gen 10 and since a new gen comes out every 3 years, that means Gen 10 drops 2025 with 2026 probably being DLC. So BW remakes will probably come out in 2027. We got ways to go