I haven't heard anything. But I can assure you, the Trek top NX is a much better functioning top than the stock. I've ran both extensively, and I've come to find that the ability to run completely topless is great, but it's even better with a Bikini top. The trek top NX comes with one, plus it looks awesome. As for a folding back trek top, I don't foresee it happening due to the trek top being a completely frameless and Bowless soft top, and the bow mechanism is what the stock soft top comes back on when it folds down like a convertible.
All in all, get the trek top. It's a great top, and if you so please, not at all hard to run completely topless.
I went back to the stock top from a trek top because I wanted to be able to have the ease of pulling it all the way down, and I have to say, it's NOT Worth it. Which is why I'm back to the trek top.