In order to build a solid team around Rondo, you need to have wing players that can shoot the three (Ray and Pierce). Having bigs who are very good midrange shooters helps tremendously (KG and Bass). This helps create driving lanes for Rondo.
I like that Danny has Sullinger and Olynyk as bigs on the team, as they can shoot. Green and Bradley have showed (for short stretches) that the corner three is in their arsenal. Now, the challenge is getting those two to consistently make threes so that team shave to respect it.
Another facet of the team that I like is Sullinger, Olynyk, Green, and even Rondo (!) have shown flashes of having post moves. If Stevens can get the ball moving around the perimeter with at least one of those four posting up, I think it will open up the offense. Teams will have to guard the post, leaving Bradley open to cut to the rim and shooters spacing the floor.
I expect the Celtics to run a lot off misses, too. Rondo is a one-man fast break, and Bradley and Green have shown they are great athletes. Olynyk runs the floor well for a big man, and Sully throws great outlet passes. I think this Celtics team has the potential to generate a lot of fast break opportunities.
I think half-court offense is going to be a challenge. Rondo is going to help out Stevens a lot because he can call plays on the floor and recognizes mismatches immediately. This will relieve Stevens of having to tell the players which play to go with every single time Rondo brings the ball up; Rondo acts as a player-coach, in that regard.
I'm optimistic that Sullinger and Olynyk will have the ability to initiate offense in the high post. This will help Rondo out, as he won't have to set up the offense every single time.
The problem I see with the Celtics in the half-court is the team lacks shot creators. Rondo can only do so much on offense, and teams are almost certainly going to be leaving him open (He can hit that midrange though; I'd like to see him start hitting threes, too.). Green can attack off the dribble, but his moves aren't that varied and he goes through stretches of passivity. Stevens is going to have to have some plays that will get the guys moving. Motion offense will benefit the team, in my opinion.
FInally, I love that the team has a lot of smart passers. Rondo is a given, but Sullinger and Olynyk can pass, too (Like I said before, expect to see them directing traffic at the high post.). Bradley needs to work on his passing, but I notice that even though he messes up passes a lot, he's always making the right pass (or extra pass, whatever you want to call it). It's a good quality to have. I think Green can pass, too, but he doesn't do it very often. If he can work out passing out of drives, it would open up the offense even more.
I'm cautiously optimistic about the Celtics offense this year.