First appearance of Scott's brother, Alex Masters (formerly Summers). Scott and Alex were both unaware that the other had survived the accident that separated them. In the comics, the brothers were sent to the same orphanage, surreptitiously run by Mr. Sinister. Sinister decided that Scott had the greater genetic potential and had Alex adopted to separate them.
A new design for Cerebro is unveiled after having been destroyed by Juggernaut in Survival of the Fittest (2001). It now resembles the large, spheroid room from X-Men (2000), which was released one year prior.