Track Builder seems to be the only thing currently by the looks of it (Though sorry if I've missed new info regarding it in the updates). Will we see anything else? Sky Rogue esque "Build a model and plop it on a pre-existing plane" or just simple decals? Nothing too extreme just some stuff to drive community made content.
Edit: Fixed punctuation. Computer power surged so I lost my train of thought. I think I got my question across though.