The game’s release date got eventually announced during the Direct mini.
☆ NintendObs Event – Nintendo Direct Mini 1.11.2018.
Directly to you from Twitter:
At NintendObserver, the comments are on Discord.
Click on Community to learn more. 🙂
…
…Wanna play? Buy a Switch.
And if you’ve already got yours, click on Kirby Star Allies for everything you need to know about the game. 😀