My Name Is Legion wrote:
Harrison is a descendant of Khan Noonian Singh. The "supermen" continue to exist as a secret clan, and the information about the Botany Bay has been passed down for generations. Harrison knows approximately where to look for it, in fact. So his life's goal is to enlist the resources to locate it and revive his ancestors.
What would have stopped him or his clan in the main timeline from finding it before Kirk did?