Realistically, of course. ...
The first words of the OP are "Realistically, of course.", so naturally, people have posted lineups:
That has Smart starting over Rondo (I guess they think it's realistic that Rondo will be traded?).
That have Avery Bradley -- freshley signed to a new 4 year, 32M contract -- coming off the bench.
That have 6' 4" Marcus Thornton starting at SF over Jeff Green (or Wallace or Young). Wow.
That have Greg Oden (when did we sign him?) starting at center. Double wow!
Uh... that's all pretty entertaining, I guess. And I guess these folks would "like" to see those things. But I'm having a hard time seeing any of those as "realistic".
Barring trades or injuries, I suspect the following would be the starting lineup on opening day:
Rondo
Bradley
Green
Sully
Zeller
Olynyk will be the first big substituted in and he, Sully & Zeller will get the bulk of the minutes at 4/5. Bass will be the 4th big.
Wallace (when he returns), Young & Turner will be the back-up wings at SF. Turner will likely get his chances early in the season if Wallace is still recovering and if Young gets sent to Maine for a while.
Thornton will likely be the first depth at SG.
Smart will be first depth at PG.
Pressey, Faverani and Anthony will be the deep bench.
All that said, I expect Danny to make at least one more trade before things are set. The above 15-man forces him to just burn Bogan's non-guaranteed contract. I don't think he wants to do that.
So look for him to do at least one transaction that results in a reduction in the number of guaranteed contracts.
For example, combining Bogans + two other players going out (possibly along with picks) to bring one player back. That sort of move can fit a huge variety of possible targets.