In 2004, before Bryan Singer, Michael Dougherty and Dan Harris left for Warner's "Superman Returns", they planned their version of "X-Men 3", which would feature the X-Men still mourning the loss of Jean Grey. Blaming himself for her death, Cyclops builds the Danger Room so the team can improve their teamwork and be more prepared for dire situations such as those they encountered at Alkali Lake. Meanwhile, a mysterious new mutant starts attacking cargo ships containing mutant slaves set to be sent to a island called Genosha and destroying makeshift mutant concentration camps. Both Professor Charles Xavier and Magneto eventually discover that this is Jean, reborn as the Phoenix. Without the psychic blocks Xavier installed in her to keep her sanity, she is completely taken over by her evil split personality and sets to resolve the human/mutant dilemma without being tampered by the "drama" of the X-Men. Wanting to use the Phoenix as a weapon to destroy the Humans, Magneto and his Brotherhood of Mutants, formed by Mystique and Pyro, enlists Xavier's former lover, Emma Frost, a powerful empath capable of controlling other peoples' emotions, to tame the Phoenix and force her to join them. Also joining the Brotherhood is the Juggernaut, a unstoppable mutant. Meanwhile, the X-Men enlist Cajun thief Gambit to their ranks, where he becomes a third party of a romantic triangle that also involves Rogue and Iceman. Singer wanted Sigourney Weaver as Emma Frost and Channing Tatum as Gambit. Besides, one of their early ideas was to include the Sentinels as the government's response to the Phoenix's attacks. This version of the X-Men would be formed by Professor X, Cyclops, Storm, Wolverine, Nightcrawler, Rogue, Iceman, Gambit, Colossus and Kitty Pryde. Dr. Bolivar Trask, the Sentinels' creator, would also appear. In the ending, after a huge battle between the X-Men, the Brotherhood and Sentinels in the yards of the White House, where Magneto attempts to murder the President of the United States of America, Jean is able to momentarily regain control of her body and urge Cyclops to destroy it with his optic blasts. He does and Jean's soul is reborn as a cosmic entity that leaves to create life elsewhere in the Universe after promising to return from times to times to check on the X-Men. Singer's version was to focus the movie on Cyclops and Wolverine equally, as they both loved Jean. There was also to be a romance between Storm and Nightcrawler and Kitty and Colossus. Iceman and Pyro's rivalry would be played out, as would Rogue's increase in confidence due to her relationship with Gambit and the rivalry that forms between the resident powerhouses Colossus and Juggernaut.