It Always Goes To Shit

What if Hans Gruber & Severus Snape were twins? What if the events in Die Hard were in part an attempt to get Severus away from wizarding Britain before Voldemort's seemingly imminent return? What if Severus had to deal with the potential of Voldemort's return & teaching Harry Potter on top of mourning his brother's death? What if he discovered the birthmark he has is a soul mark?