Nintendo giving Next Level Games time to wrap up Luigi's Mansion 3 before they lock in a specific release date

We saw a lot about Luigi's Mansion 3 at E3 2019, but what we didn't get was a release date. We know the title is due out sometime in 2019, but why didn't Nintendo share an exact date? According to a Polygon interview with Nintendo's Bill Trinen, Next Level Games is “putting a lot of care into the game." Furthermore, Nintendo wants "to let them put the care into it they want," which is why they're waiting on the final word from Next Level before a solid release date is announced.