I'm currently in gen 5 and from what I heard, any unspent PP will carry over. I've around 6k of PP not including the character's level up PP. My Leo alone has around 1k PP, so if I don't spend any of that, when I start NG+, my PP will be 7k ( I hope I'm right).
My PSN: terry92126 The word 'impossible' isn't in my dictionary... but I don't really have a dictionary you know?- Eikichi Onizuka
Right. You won't get the DLC -again-, but you'll keep any unspent portion of it for the next run.
I highly doubt the unspent 'character' PP will transfer. All levels are reset and it's like you've never played the game before on New Game+ aside from some titles and your shops and your Gold/EP/TP/PP you didn't spend in the bank. The only items you keep are the DLC-only equipment and monster weapons and books.
"In peace, vigilance. In war, victory. In death, sacrifice." ~ The Grey Wardens http://www.trueachievements.com/mygames.aspx?gamerid=71900
The points of my characters were converted to PP when I started a New Game Plus. I had about 7000 PP at the end of one playthrough, and I started the next with about 12500. The amount of PP I got from the final battle was less than 5000, and I had about 5000 unspent character points.