Alternate Endings of Movies that aren't Big

[Loach]

@Darren_Garrison

The year is 3217. What parts of the Earth are not flooded with shallow seas are plains of radioactive dust, both devoid of all life. Suddenly, somewhere in some improbably still-powered bunker deep underground, a new post appears in this thread…

The only way to stop that future from happening is for an intrepid band of adventurers to travel back in time and stop the evil OP from starting the thread.