I typed zipline into the search and found very little, I think a zipline would be fun. Build a point A and a point B, if line of sight isn’t broken then WOOSH! You now have a one way ticket across a section of the land. There would have to be an item specifically for this so that you can hook on, and the ability to jump off early is up for debate. What do you guys think?
Has this topic come up before? I only saw one mention when searching and it wasn’t even about ziplines.
That would be pretty fun! Maybe as a more permanent version of the hookshot?
Cool idea! Also for transportation of goods 
You know, I think it came up briefly on the original forums, but was quickly overshadowed by how awesome the hookshot is, and the ol’ arguement that it bypasses danger… nonsense, I say. It is beginning to look like the sky will be just as hostile as the ground!
On a side note, I would like to see ziplines require to be set up on both ends first, rather than shoot across. Place two ancors, then run a line across them to place a zipline.
Also, zips should bot be tight, but somewhat loose so that they sag a bit, like most RL ziplines.
Imagine instead of a hookshot/grappling hook combo for climbing titans, having a guy launch a huge ranged projectile that when it lands it creates a zip line the whole party can use to get up and be organized on the surface of the titan, maybe use it in combination with the hooks to launch urself off the zip line and allows you to find angles of attack in coordination with your party members instead of that random hooking onto the titan we saw in the trailer.