Definitely some plans for stuff along these lines, though it's all a matter of how much we can actually get done in the next few months
We are definitely planning on a NG+, as well as bonus endless missions, and all sorts of ways to make the game ridiculously hard. Plans are in motion
Leaderboards sound like something we might, do, as well, if I can figure out the technical/security side of it. It's pretty simple to set up, it's just you have to come up with an implementation that's not trivial to hack, and then a game design that makes sense as a leaderboard.