Here is where you can find out about Dr. Manhattan and Jean Grey's origin.
http://watchmen.wikia.com/wiki/Jon_Osterman
http://x-men.wikia.com/wiki/Jean_Grey
Scenario: Dr. Manhattan is aware of an alternate universe in which the desimation IT would result in the destruction of HIS. He crosses, Demensions, powers still intact to meet the cause of the disturbance, the Phoenix. She tells him it would be wise to get out of her way, that the humans would pay for what they did to Scott. After expressing how little he cares they inssue in combat.
Who is the victor?