Originally Posted by Duran Man
But, why would the time traveler go all the way back to the 60s? I guess it could be the case that he/she goes too far back into the past and helps the X-Men there foil whatever plot the Brotherhood are trying to carry out.
In the comic, the assassination takes place in 1980.
In this film, it'll take place in the 60s (unless they push the timeline forward from FC).