To start off( if you know what a wormhole is, skip this) a wormhole is a theoretical way to bend space-time so that you could travel from point x to point y by making the distance shorter and then taking a small jump across. Imagine a sheet of paper and you cant get from one end to the other because it takes to long. Instead, you fold the sheet( representing space-time) and poke a hole through, thus getting to the other side
. The physics are complicated, and I myself don't understand them very well, so I am not going to dive in that here.
What a wormhole probably looks like( from Interstellar).
http://thumbs.media.smithsonianmag.com/filer/de/f4/def4bfe3-a912-4ba3-b673-1a4e751fc38f/wormhole.jpg__800x450_q85_crop_upscale.jpgWormholes in Us2 would work like this in my mind: you select the wormhole, right click one point on the grid, right click a second point, and then you have a wormhole. If you fired an object into it, you would see space-time curving around, and then emitting the object from the other side. If you were standing on the object, you would see this:
http://i.imgur.com/DgD4TEn.gif again a courtesy of Interstellar.
Anyway this is just an idea I had.
Prairie dog stares at ya.