I found out about this
a little while ago. A trilogy of modules in Sigil should be a lot of fun (or perhaps the Lower Planes from the 'inferno' part)... This looks something like a spiritual successor to PS:T.
All the modules should add up to 45 hours of gameplay, with the second coming out on September 1st and the last on December 15th (not sure about the first - they said it would be in Q1 but we're two months ahead of that).
Looks like another thing for NWN2 to look forward to!