guys i'm having a theory for this!
i think you all know how the mysterious icon that appeared in a few player's games looked like. for the ones who don't know: it was a 2-splitted heart made of 2 colors:
pink and
purple
so the left-heart dragon seems to be a red-blue hybrid. and we all do know that red+blue also equals
purple (magic dragon). that means that the right-heart dragon might be a red-light hybrid because red+light =
pink.
get it? and these two dragons mixed together could make the new icon dragon!