WASDuk's Chris Patton goes all psychological and describes why Damian Wayne cannot be wedged comfortably into the other generations of Bat-family members:
"One ought to go Freudian here and label the three generations as the id, ego, and super-ego, but the fact remains that DC Entertainment cannot wedge Damian in with the other generations who have history on their side. At one point, Deathstroke stabs and crucifixes Damian to a wall with his swords. Suddenly, Damian tears his arm through one of the swords, picks up another sword on the ground, and proceeds to beat Deathstroke to a pulp. It’s far, far more of a head-scratcher than the introduction of Blight and Inque were back in the Bat-day."