Me and my friends over xbox were joking around with Batman's origin story, then one of my friends had a stroke of genius; What if Alfred made Battman?
Many people in Gotham no of Wayne's tragic childhood, but not his secret identity. Alfred knows both, having raised him (Depending on the origin behind the butler).
Alfred is driving back to the manor after getting the ingredients for dinner. On his way back, he gets transported back in time to the night of the murder of Bruce's parents. Disoriented, he hits and kills a pedestrian. This man is none other than Joe Chill, killer and creator of Batman. Since Chill is dead, Bruce never has the traumatic experience of watching his parents die, thus never becoming Batman and saving everyone on many occasions. Realizing this, Alfred knows the horrible crime he must commit. The butler dons a ski mask and wear's Joe Chill's clothes. He then heads to the theater and kills Wayne's parents, insuring bat man is created.
What do you guys think? Explaining the time travel bit may be tricky, but I think this is an interesting alternate reality.