...am I the only one who thinks there's no way that kid could grow up to be that dude? His whole head is radically different in every way and shape. Also, his head had to have shrunk over the years to become that, literally the opposite of what skulls do.
Not necessarily. Remember he was 12 in season 1. Thats when you start going through changes but there are many people who get a second wave of changes somewhere near the beginning of high school. And honestly they look alike to me. The main difference is that with most cartoons/anime they exaggerate the eyes, ears a little bit to show the differences between kids and adults.
It's funny because before this show I really didn't have much interest in the bat character Nightwing. But then Season 2 starts, Dick Grayson switches to his Nightwing persona and man I love this shows version of Nightwing. Young Justice is what really got me invested in Nightwing, now this is the way Nightwing should be.