It's seems pretty clear, between the Live Trigger system (where you can generally only choose one dialogue option), other mutually-exclusive choices, and the talk of monthly DLC that Square-Enix expects people to play through Final Fantasy XIII-2 multiple times.
But it's not clear, at least to me, whether there's a new game plus option, where you can keep some or all of your original progress as you restart the game: an interview (in Japanese) back in December 2011 supposedly mentioned the mode, but neither the manual nor the official strategy guide mention it, and I can't find a confirmation from anyone who actually played the game that the mode was ever implemented.
Is it available, or is it impossible to get 100% completion in any individual play-through due to various decision trees locking certain options out?