User blog comment:Master Sima Yi/Assassinews 12-05-'15 — Assassin's Creed: Syndicate has been revealed!/@comment-210.187.170.102-20150807113620/@comment-1888015-20150809071214

You can't change history that is already written. The Animus or Helix merely allows for someone to view the past through a bloodline, theirs or someone else's, using a puppeteering system.