While I'm only just trying to come to grips with the havoc wrought by Undermountain, Cryptic already announced the next module coming in August, called Uprising.
It will introduce the first new race in a while, the Gith. I have to admit that I'd never heard of them before this, and my first impression is that they look like the love children of orcs and elves. Also, apparently we'll be going to space?! I'm not familiar with that part of D&D lore at all, but it sounds wacky.
To me though, the most intriguing change mentioned in the announcement post was "recrafted early game zones and stories". I've never found Neverwinter's levelling particularly engaging, but it's serviceable, and to be honest I'm not sure what they could do to make it better, the game being what it is. Makes me glad to be levelling a new character right now though - that means that the current content will still be fresh on my mind when it comes to comparing old and new.