Hypixel Studios said at first that they would release Hytale in 2021, and that may still be the case.
However, they later released a blog talking about their progress, and in it they said that they cannot release Hytale until 2023 at the earliest.
Roughly, there is a few years it could be released in.
2021 (highly unlikely), 2022 (slightly more likely), 2023 (most likely), 2024 (somewhat less likely) or 2025, of which by then it should be released. Please vote on which you think is the time it will be released! Also, I think I know which one everyone WANTS it to be released at (2021).