I have written sci-fi short story. Question is how fast and loose am I playing with science and theories about the big bang and dark energy. This is the summary of assertions in the story. 1) Dark energy is the reason for the original expansion of the observable universe including (space and time). 2) Dark energy was in balance with other forces at the moment of the big bang. 3) Dark energy is like a candle lit at both ends - meaning it will deplete at some point because its rate of consumption/use is increasing. (universe expanding at an increasing rate) 4) My fiction just assumes (3) and posits that at some point in the future the observable universe begins to collapse like a deflating bubble. 5) Assuming 3 and 4 (this is the really large leap). As the universe collapses, space, time and matter are erased at (for lake of a better word) the event horizon of the collapse. 6) An implied assumption is that the process may resemble inflation theory in reverse. (also implied would be that the rate of collapse would be increasing). 7) The last assumption is also large. The remaining inhabitants are aware of the process, have migrated to the center of the universe, where they find a central super-massive black hole. The fiction is a humorous treatment, which stands on its own from that point of view, but I'd like some help if possible to shave a little of the hair off the big assumptions. The task exceeds me.