The Mid-Credits Scene

Lastly – and this is the biggest connection of all – the mid-credits scene sees Thor and the remaining Asgardians flying to Earth on Korg's ship. However, a larger spaceship blocks their path. Obviously, we don’t see who’s at the helm, but we’re all assuming that it’s Thanos!

Kevin Feige said that the name of the ship is Sanctuary II.

So we already know how Thor ends up floating unconscious in space. But the bigger question is this: If Thanos defeats the God of Thunder, what happens to the rest of the Asgardians? It seems unlikely that they’d all be killed, since genocide isn't exactly the path Disney would take with such a family-friendly franchise.

So maybe the remaining Asgardians (and Hulk) will be kept as prisoners. Who knows, maybe they’ll even turn evil. Maybe Thanos will find his Black Order among Thor's companions, as this theory says.