Okay, so this is some speculation of the definitely mindless variety.
Tony Stark in the new Invincible Iron Man series is looking into the fact that he was adopted by the Starks.
Mary Jane Watson will be appearing prominently in the series. Much has been made of the fact that she may be his new flame-haired belle.
Except here's a thing. Her parents, Madeline and Philip Watson were high school sweethearts, married at eighteen. They had Gayle Watson when they were twenty and Mary Jane four years after that.
Philip was a bit of a drunk.
Just wondering, but what if they had had a child before then, were too young and gave the child up for adoption?
What if Tony Stark and Mary Jane Watson are brother and sister and his parents are the Watsons? Would an approximately eight year ago gap work?
Just mindless speculation…