http://www.exitmundi.nl/exitmundi.htm A collection of end-world scenarios . Many are very unrealistic or tongue-in-cheek but pretty entertaining nonetheless.
I'm inclined to agree with Agent Smith on the matter. Humans have exterminated most megafauna in the last 10,000 years, in the last few hundred deforested most available woodlands/forests, and are currently on track to exterminate themselves by both population growth and too highly specialised farming ( to productive?) methods. We are the only species, to have made, and controlled fire, or used it to control natural environments. We are the only species to make, or use compound tools. If we were ants, it may not matter that we can farm and harvest zillions of creatures that weigh mere grains, and have a global population of squillions, but were not, WE are megafauna in this age, and have done slightly to good job of it, for us to exist happily into the next few centuries, certainly without massive, and monstrous population control. No, all other species exist, and live or die depending on there effect on their ecosystem. Humankind has broken all previous barriers, and continues to. Hey , i like being human, its kinda fun, all this being self aware, and complex communications and society, it has a real thing going for it, much better than a grain fed slaughterhouse yearling, for sure. Not sure what i mean by all that, except, we AIN'T getting off this planet, anytime soon.
Distances are too great and the current mode of space transport is too slow. We ain't going anywhere anytime soon. Some natural disaster will kill us off long before any man goes to deep space. Better fix up the home we have.
Keeping humans viable in space travel is likely to be expensive and slow. Some day we may figure out (i) how consciousness really works and (ii) how to reproduce it. Then we upload into machines, send them out to different places, they stay in contact like beacons. If primary beacon signal dies, another boots up, etc. Anyone interested in novels with these themes (consciousness in software, and survival through catastrophe) might enjoy Greg Egan's Diaspora/Schild's Ladder.
One of the best films of all time was Catch 22. Another book with that theme is Physics of Immortality where the author, a physics professor from Tulane, applies the far flung math to concepts like the extent of neuronal permutations and combinations and thereby attempts to define consciousness by the total possible number of patterns neurons can achieve. All the bases are touched in this book for colonizing the Universe with all the zeros anyone could need to put it into ...perspective
I have (or, years ago, I did have) a copy of that book somewhere - Frank Tipler, right? I have to say that when I began to read it (some years ago) I found the claims extraordinary, difficult to follow and difficult to credit - but you may have grasped it all better than me (particularly in view of the fact that you style yourself 'OmegaPoint')! I wonder what Dr Tipler makes of the multiverse hypotheses out there. Catch 22 remains my favourite novel. Impossible to capture all the wordplay in film, but what they came up with was hilarious. That reminds me of American Psycho - I thought they couldn't possibly film it, but they toned down the gore, turned up the humour and it is still Christian Bale's best film.