I'm not claiming to be prescient or infallible, Nic very well could fall short of my predicition, but I personally believe he's going to average 28-30 minutes per game if only because of his innate defensive abilities.
The reason I think he's got it in him is Nic was only 19 last year, and guys typically make a pretty substantial leap from year one to year two ... so yeah I can see him putting up "Martell" or "Travis" numbers this year -- I think he's got that much promise and raw talent.
I really don't think Martell is going to gobble up as many minutes at the 3 spot as people think.