Praise the Comic Gods, we now know that Jean Grey was not a real character. The original Jean Grey was Fongji (Bird of Fire). Apparently, Sinister must have gotten her hands on a piece of Fongji's chi-infused DNA and somehow placed it into Elaine Grey's womb.
The original, one and only.
Hey you! Girlie!
Does this change the way you feel about Jeansus?
Will Jean always be first in your heart, or is she somewhere after Hope, Rachel and Maddie?
Did the Grey family die for nothing?
Is Hope the X-24 to Jean's X-23?