Watch X2: X-Men United (2003) HD Full Movie Free on solarmovie.do. Watch X2: X-Men United (2003) online free. When anti-mutant Colonel William Stryker kidnaps Professor X and attacks his school, the X-Men must ...When anti-mutant Colonel William Stryker kidnaps Professor X and attacks his school, the X-Men must ally with their archenemy Magneto to stop him.