As the film ends humanity has moved from Earth to space stations, Brand has set up camp on a new world and Cooper is off to meet her. The blight of the famine on humanity is in the past, but the exactness of our future is still unclear. The humans in space appear to be gearing for further exploration. As they're near Saturn, clearly the wormhole is in mind, with the elaborate fake Earths only temporary. But what will this world be like? Not in geography or anything, but in society. The famine destroyed much semblance of nationality and there seemed a shaky peace. Will humans now live as a united people in one "global" community? Some clues hint not; the spaceships look distinctly more military than before, suggesting that the peace from which Endurance rose is now over and the usual evils that come with humanity are going to return. You then have the added hints at indigenous organic life; if they're anything more than plants and bacteria we're moving there as invaders. Of course, we now face the possibility of two different human races, genetically and physically identical but with different origins. You'd have the descendants of those born on Earth from the space colonies and those grown from the embryos who first grew on Edmund's planet. Now if that wouldn't be fuel for a sequel we don't know what is.
