I'm sorry if this has some crossover with the New Game+ discussion, I don't mean to clutter things up.
As far as difficulty options go, I'm wondering what's currently planned. In terms of unlocks, I really can't stand it when higher difficulties are only available upon completing the game, even though it might encourage replay value. You could certainly do increasing difficulty by NG+ levels and have a constant flat difficulty for everyone at start, but if you do opt to go for actual difficulty selections such as Easy, Normal, Hard, etc., I'd love to see them be more than "Oh, all the enemies have more health and do more damage now." Things like additional enemy spawns, maybe even some minor enemies spawning in boss fights, would be amazing in my opinion, although more health and damage on enemies would be good too.

