So everybody has two choices here. To dismiss all this stuff as my imagination and lies and pretend the artist spilled some water colors that ended up making a sleeping black child's face in the hand of Jesus next to a bird, OR... accept reality.
You forgot about option three: OK, class, let's summarize.
Option one: This stuff is just JCanon's imagination. A popular choice among the pundits.
Option two: The artists employed by the watchtower purposely hid the head of a "black" fetus in the hand of a picture of Jesus as a supernatural attempt to keep the messiah from succeeding. I have to be honest, I think I'm missing the point on how this would actually deter him, but that's just my opinion.
Option three: Somebody finally got their disability approved and finds themselves with WAY TOO MUCH FREE TIME on their hands. I don't know, but I kinda like this option best...