The official Kirby Twitter posted another preview video of Kirby: Star Allies, this time showing off a small part of the game's opening cutscene. The video may be considered a spoiler to some, so don't read on if you want to go into the game blind!
From what I can glean, it seems like the giant, crystalized heart we saw in the latest trailer (called something along the lines of the "Jama Heart" in Japanese) dispatches smaller dark hearts, corrupting those who look at them.
Interesting stuff! We'll have to see how this plays out afterwards when Kirby: Star Allies launches worldwide on March 16!