Pietro Lensherr was thought to be dead just like his sister Wanda, but turns out he survived and now after the Death of his Father Magneto he is in charge of the Remaining Brotherhood of Mutants (With are only Sabertooth and Mystique at the time but at least a start). This takes place in the Original Ultimate Universe also designated as 1610 after the Ultimatum Event

After the Death of Magneto by the hands of Cyclops, the still alive Quicksilver toke over the Brotherhood of Mutants with Mystique as Second in command (This takes place in the Original Ultimate Universe also designated as 1610 after the Ultimatum Event)

After Karen Grant (Jean Grey) gave Bruce partial control of the Hulk, he joined her Black ops Team called the Tomorrow People with worked under Nick Fury (This takes place in the Original Ultimate Universe also designated as 1610)

Derek Morgan left his brothers Home because he whould have arrested him for being a mutant because it's against the law (his brother is a Cop) he now moves from Hotel to Hotel with his new friends Jimmy Hudson, Karen grant and Lizz Allen, (This takes place in the Original Ultimate Universe also designated as 1610)

(this takes Place in the Original Ultimate Universe also designated as 1610) after the Ultimatum Event had concluded, everybody started hating on Mutants to a point that it was Illegal to be one, so after the death of almost every X men, Jean Grey toke on a fake identity and calls her self Karen grant now