Ah what the heck, I might as well post this on this forum too, since I'm sure someone will find it interesting or like it. If you're reading this and can't post a positive response kindly refrain from replying. That is merely a suggestion, please don't take it personally. I feel it's the best explanation I can come up with for this largely misunderstood event. Just want to have a place where we can discuss this event on it's own. I also made accompaniment pictures to further explain the chain of events visually and succinctly too. (Open the images in a new tab for full size.) Here goes: 0. Bruce begins the decryption and since it's taking time, he seems to have dozed off. We jump forwards in time to the Knightmare scene. This is all within Timeline A. 1. The scene shows us a future, where Lois has died, Superman has gone rogue and Darkseid rules the Earth. Batman is living on the lam with a group of followers and trying to get Kryptonite to take out Superman who is now evil. The movie actually jumps forward in time, it doesn't just show a 'possible' future or a 'dream' sequence, it shows an actual future that IS HAPPENING as we watch it, in Timeline A. 2. This shows us that he doesn't have access to Kryptonite in Timeline A and possibly NEVER had access to Kryptonite in Timeline A and so he couldn't take out Superman before and then Superman somehow lost Lois and went rogue in that future. We don't know what events happened to lead us to that point, but they were obviously very different from what happened in the movie, therefore ANYTHING that happens after the Flash turns up cannot be considered as part of that Timeline A and we can be assured that different events took place as opposed to the events in the movie after that point. Barry meets Bruce in this timeline at some point before the Knightmare event. 3. Batman is killed by Superman at the end of the Knightmare event, ending Bruce's consciousness in Timeline A. That is the last thing Bruce's memory holds from Timeline A. 4. The Flash travels back to the present from AFTER Batman dies in Timeline A to deliver a message to Bruce who is still in Timeline A but in the past so that he can avoid that future, where he dies. 5. The Flash enters the past and the events after that point begin to collapse. Timeline A is COLLAPSING upon itself to converge at the Flash Point. Future Bruce is merging with present Bruce. 6. Bruce wakes up startled from his 'Knightmare' when he dies since those memories are residual from that timeline that has just CHANGED by the appearance of the Flash and since it is the last thing he remembers from that Timeline A. You can see that he has actually 'dreamt' of his death at the hands of Superman since he is holding his chest in pain or shock from those residual memories. The Timeline A is collapsing onto itself at this point, therefore Bruce has residual memories from his future self from just before his death. This is all due to the occurrence of the Flash Point and it's accompanying effects. 7. Flash and Bruce apparently know each other very well in that future of Timeline A which is now collapsing, rendering that event void. Hence Flash says, "Am I too soon? I'm too soon!" when he sees that Bruce is confused and doesn't recognize him or understand what is going on since he created the Flash Point before they ever met. 8. After Flash delivers his message Bruce gains new information and two things change in Timeline A: a. Batman learns that Superman is a completely assured threat and acknowledges it (1% chance dialogue after this event). b. He learns that he MUST get the Kryptonite to stop Superman or else he WILL fail. He remembers his failure(death) from the Knightmare event. 9. As soon as Bruce goes through this event and the Flash leaves, the timeline RESETS itself to that point, the Flash Point, and so Bruce wakes up from his sleep again JUST as the portal closes and the Flash leaves Timeline A, which is now becoming/transitioning into Timeline B. The future from Timeline A is totally eliminated and a new Timeline B is formed from that point onward but Bruce still retains those residual memories since he was the flux point or inflection point (common factor/human observer) of that event. He also remembers the Flash Point and the Flash's appearance since he immediately looks around in the direction of the portal when he wakes up again. The portal closing is the only common event between Timelines A and B and therefore we see its residual effects in the form of the falling papers in Timeline B. 10. THIS EVENT of the Flash appearing and making Bruce acknowledge the threat and his need for Kryptonite, changes the future and that ripple effect leads to the chain of events seen in the rest of the film which culminates in Lois not dying and Superman dying. Batman gets the Kryptonite and makes a spear out of it. That allows Superman to kill Doomsday but he ends up dying in the process. TL;DR If it still isn't clear, I'll repeat and summarise: In Timeline A Bruce meets the Flash at some point and DOES NOT obtain Kryptonite and thus fails to attack Superman who then kills him. Then the Flash goes back in time to warn Bruce that he was right about Superman going bad and to help him avoid his death. The Timeline A was changed at first by the very act of the Flash appearing and creating the Flash Point and Bruce kept his memories from the future due to the effects of the Flash appearing and creating a timeline distortion. He dreams of the future DUE TO THE VERY FACT that the Flash appears and changes the timeline. Then when Flash leaves and Bruce has new information and a new conviction which means new actions and a different future, the Timeline A resets/collapses to the Flash Point and a new Timeline B is formed from that point onward, with completely new events. It seems that the event of the portal closing is the only common event in both timelines (because that was the exact moment the Timeline reset from A to become B) and therefore we can see the papers flying about when Bruce wakes up the second time, which he did because he was reset too. In Timeline B Batman gets the Kryptonite, creates the spear and attacks Superman who later uses it to kill Doomsday since there was no other way and ends up dying himself. FIN. Whew. PS: Here's something really interesting that I just found out thanks to a user on the other forum where I posted this article originally: Jay Olivia of DC Animated movies who worked with Zack on the scene says: Except for the Batman not sleeping off part, my explanation is the exact same one! Sure, that's his own interpretation of the events but it's from an official DC honcho and one who worked on the scene.