What happens if two ships come out of hyperspace at the exact same time and place?

Question

When ships come out of hyperspace, it looks like they just "blipped" out of nowhere.

I know it's not very likely, but what happens if two ships accidentally come out of hyperspace at the same place and time?

Would they fuse into each other or destroy each other in an explosion (or maybe the former followed by the latter?)

Or is there some aspect of hyperspace travel that makes such a scenario completely impossible?

Related: Could you destroy the Death Star by having a ship come out of hyperspace in the middle of it?

Answer 1

This is almost precisely what occurs in the new (canon) Star Wars novel "Tarkin". An interdiction field is used to disrupt a hyperspace shipping lane and a bunch of ships drop out of hyperspace on top of each other. The results range from simple glancing impacts to two of the of larger ships becoming embedded in another.

That being said, none of the ships disappear in the traditional cloud of radiation, so the most likely answer to your question is that two ships don't appear to be able to precisely occupy the same space in hyperspace, any more than they can occupy it in realspace.

Close to the Interdictors, ships began to appear where there had only been star-filled space. Tarkin turned from the forward bay and stumbled back to the data pit to study the magnified view on one of the screens. First to drop out of hyperspace was an outmoded, saucer-shaped YT-1000 freighter, followed by two angular transports and a lustrous space yacht. Then another freighter winked into visibility, followed by two passenger vessels.

Abruptly, Tarkin felt as if he’d been shoved toward the rear of the bridge. With the interdiction field neutralized, the ships that had been caught in the invisible web began to whirl out of control. Two of the ships collided and drifted out of view. The magnification screen showed the sublight engines of other ships flashing, but the ships barely had a chance to flee or correct their spins when the field re-initiated, capturing them once again. Tarkin spread his legs wide in an effort to balance himself; then his eyes went wide as well as he turned to face the viewports. Listing on its port side, an enormous ship that more resembled something grown than built decanted, broadsiding the Detainer CC-2200 before careening into a spin that left its dorsal surface impaled on the Interdictor’s sloping bow.

Answer 2

There is a one-to-one mapping between points in hyperspace and points in realspace, so the only way two bits of matter could emerge at the same point in realspace would be if they already occupied the same point in hyperspace immediately before that. In real space, obviously if two objects try to move into the same region they will crash against each other and the repulsive forces generated in the crash will keep their particles from occupying exactly the same points of space. These repulsive forces still seem to be operative for the internal matter of a ship in hyperspace (people on board ships in hyperspace can't pass through walls and floors of their ship for example), so I'd assume the same would be true for different ships in hyperspace; if you tried to move them into the same points in hyperspace, they'd just crash against each other.

The fact that there is such a one-to-one mapping is confirmed in the Millennium Falcon Owner's Workshop Manual which says on p. 54:

it is understood that hyperspace is coterminous with realspace: each point in realspace is associated with a unique point in hyperspace, and adjacent points in realspace are adjacent in hyperspace.

As for ships crashing in hyperspace, I don't know of any depictions of this so that's a speculation, but it has at least been shown that ships can travel near one another in hyperspace, as in this image from The Clone Wars episode "Citadel Rescue":

Also see this image from The Force Awakens which was posted in this answer: