I see Lance as the best comparison from our past players too (or a much more ripped Tony Lang), but I don't see why he wouldn't have Lance's buy-in. This kid has seemed like he wanted a Duke offer from the get-go. His dad is a former VT football player and sits on one of the University's boards, so the other visit makes sense in that respect, but he's certainly deciding and committing earlier than Lance did.
If the rest of the frontcourt were to be three other freshmen in Jalen, Mark Williams, and Kessler, I think Coleman still plays most nights. If one of those big dudes rolls an ankle or something, he's probably getting 15 minutes.
I feel like his best physical comp may be more Trevor Booker than Brand or Zion. To me, his adidas numbers from this summer: 66% FG, 73% FT, and 2 of 9 three-pointers are promising enough. He's not a total non-shooter, but seems to have great shot selection. If you can get a guy like that who can also contribute on the defensive end, he's a great piece.