So, I know a bit more about the Darkforce Dimension than the other two, and I know all three are separate (I believe) but I feel like a few things make them seem to be connected.
I can think of one example in Marvel Knights (I believe), don't remember what issue (I can find it through) Punisher, Daredevil and a few others were stuck in the Darkforce Dimension and Nightmare was after them. As far as I know, he was never stuck in it, so he must have come from his own.
Maybe my lack of knowledge on the other two is making me wrong, but are they all connected somehow? Like maybe same plane, different Dimensions?
Edit:I also just read that Blackheart is most powerful in the Darkforce, so does that mean his father's dimension is also connected? haha
I'm curious to see if you guys can help me, or if it's up in the open, what your opinions are. Thanks!