Starting out, I could see the Celtics going with KG in the usual 5-5-5 pattern. Jason Collins starting, but only playing about 15mpg.
So, you start with Garnett/Collins. Garnett sits after five minutes and you bring in Bass. You might also bring in Wilcox at the same time, or you might wait a few minutes than sub in Wilcox for Collins. When KG comes back, you get Bass/Garnett as your front line. Bass sits and Collins comes back. Garnett sits and Wilcox comes back. Bass replaces Collins. Garnett replaces Wilcox.
So, it might look like:
1st quarter
0-5 Garnett, Collins
5-10 Bass, Collins/Wilcox/Green
10-12 Bass, Garnett
2nd quarter
0-3 Garnett, Collins/Wilcox/Green
3-5 Two out of Collins/Wilcox/Green
5-7 Bass, Collins/Wilcox/Green
7-12 Bass, Garnett
It obviously depends on matchups, foul trouble, when timeouts are called, etc., but that is how I could see the rotation going. Repeat the same pattern in the second half.
The way Doc has played rookies, I could see Sullinger or Melo being given occasional minutes listed as Collins or Wilcox at the beginning of the second quarter. If they don't screw up on defense, they may earn more than a couple minutes in the first half and some additional minutes in the second half. If they do screw up on defense, no amount of good on offense will earn them more playing time.
I see Collins as a depth guy who they can have start out the season as the nominal starter and end the season as a guy who racks up DNPs unless the opposing team makes it impossible to play smallball.