I just found this on the Kingdom Hearts Wiki, and apparently it's the symbol of the new monsters. I've no idea if it's officially their emblem, but did notice something interesting I don't believe anyone's pointed out. You heard it from me first: the shape of it resembles Maleficent's head. _O:
The top spikes resemble her horns, and the side spikes resemble...whatever the hell you call those on the side of her face. As for the bottom of the emblem, it looks similar to her collar. And the central heart shape resembles her face, for all of you who can't see it.
The top spikes resemble her horns, and the side spikes resemble...whatever the hell you call those on the side of her face. As for the bottom of the emblem, it looks similar to her collar. And the central heart shape resembles her face, for all of you who can't see it.