Jean Grey of Earth 7654321
Here's what my entry for Jean Grey would have been:
In this reality, Eternity, the being who represents all reality, was dying. Without It, everything would cease to exist. The only hope was for someone to take It's place and become the living embodiment of the Universe. As the other cosmic beings of that universe squabbled amongst themselves, reality rapidly neared destruction. Finally, Jean Grey, the Phoenix decided she had enough. Despite all that she had to lose--her husband, Scott, and their three children (Rachel, and the twins Charles and Nate)--she did not hesitate. She kissed her family goodbye, took one step, and became the living embodiment of the universe.