While information is limited regarding the official changes, SoundLand does have an official site, and they're already selling "Earlybird all-music wristbands" for $35. Price goes up to $55 in late June. From a release:
NBN isn't going away; it is evolving. With SoundLand, we'll still be putting on great shows in Nashville's best venues featuring local, regional and international artists ala NBN. But now there will be more parties, outdoor stages, arts, crafts, local food and more.
Stay tuned, as more SoundLand secrets will be revealed soon. In the meantime, you can check out the FAQs to gain a little more insight (and clues?).
The aforementioned FAQ page notes that participating venues "will include Mercy Lounge, Cannery Ballroom, Public Square Park, Third Man Records, 12th & Porter, MAI, The Basement, The Station Inn and more." The SoundLand folks also indicate that — while the conference element of the festival will still be present — "it will not be a traditional conference and it will not take place in a single location." There will instead be "field trips" and "artist-led workshops."
One of the biggest changes affecting local musicians is that, though there will still be local bands in the lineup, there will not be a submission process. "For this year," says the site, "the event will be purely curated/booked by NBN with the help of our Programming Committee and our organizational partners (Record Labels, Performance Rights Organization's, Booking Agencies etc.)." SoundLand says the initial lineup will be announced "very soon," and folks who follow them on Twitter, Facebook and their email list will be privy to clues and VIP ticket giveaways.