Recently I watched an episode of Through the Wormhole: With Morgan Freeman. It was talking about the big bang and the extreme end of the universe, at the end they were talking about humans recreating the big bang instead of dying out. They talked to scientists studying small black holes and such, and theorized that theoretically humanity could recreate the.
If you have read the very end of the timeline, you will know that ultimately it ends with everything drifting infinitely apart and breaking down to subatomic elements. That doesn't sound like a fun far future. The physicists that they talked to on the show said that theoretically its possible to create a big bang again. Keep in mind that we have literally quadrillions of years to create this before collapse even begins, so if we survive and thrive there is no doubt we will have the tech. Anyway, the problem with the theory is that the big bang would only last a fraction of a fraction of a fraction of a second before it goes into another universe through another universe through an infinitely small hole, all while having an explosion trillions of times stronger than anything we can create today.
They went on to theorize how we could shrink to get through the hole fast enough. The point is, a quadrillion year old, AI-human(and maybe more species) civilization will most definitely be able to overcome these obstacles.
If you really think about it, why limit us to one universe, we might have a potentially infinite amount of universes, and inter-universe and intra-universe travel. Of course we would have to have mastered time travel at that point to make that type of travel possible. And hey, maybe we'll find what's beyond the limit of space, past the point of infinity.
I realize that this is all theoretical and a bunch of ifs, but that's kind of the point of this forum anyway isn't it. I'd kind of like to see something like this added to the timeline.