I think in his rookie season (assuming he is healthy) Olynyk will be good for about 12 points, 7 rebounds, 2 assists in about 29 minutes of play.
If he gets sufficient minutes (at least 32 MPG) I can see Sullinger averaging a modest double-double. Someting like 14 points and 10 rebounds.
I see Green's numbers hovering around the 20 PPG / 6 RPG / 3 APG mark, right around what he averaged in the games he started last season.
Bradley I can see averaging around 12 PPG (with NBA-best perimeter defense)
Rondo I see averaging around 17 / 9 / 5