most of them are related anyway:
http://www.killermovies.com/forums/showthread.php?s=&threadid=291339
I understand your point but I'm talking on the genetic level here. For all intensive purposes, Madelyne Pryor ( Jean Grey's exact duplicate ) is Nathan Grey's genetic donor. Every bit of Madelyne Pryor genetic wise is an exact replica of Jean. So speaking technically they are related. I don't buy into that half brother and half sister, step father, step mother crap in the Summers clan. They have too many genetic CLONES and alternate timeline children running around for any of their offspring to be HALF anything. It's not like Madelyne Pryor was an entirely different person when it came to her biology. Her personality was just different. Jean is the genetic donor and mother to Cable, Rachel, Stryfe and X-Man. Just like Madelyne, the exact genetic duplicate is mother and donor to Cable, Rachel, Stryfe and X-Man. See my point?
imagine the power produced by the offspring of superman & wonderwoman.... super+wonderful= i dont know but its gotta be good.
it would have superstrength, the blessing of the greek gods maybe powers and mystical weapons (like ww's bracelets) endowed on it by them, invulnerability, flight, ..............................
Definitely Cable and Domino. In the recent issues concerning Domino's past she was genetically bred to be a mutant with unimaginable psionic capabilities. Unfortunately there was some sort of screw up in her development and her powers developed as a semi latent probability altering aura. She was inevitably deemed a failure by her creators and shipped off. But her much younger sibling Lazarus displayed powers that were considerably potent especially in the mutant community. I'm assuming that the potential is still there only her body wasn't able to develop it. And who knows? Mixing it with the potency of Summers DNA might unlock and enhance this genetic power giving their child powers that would frighten even Galactus.