Don't worry there is a force out there more powerful than common sense or realistic expectations and that force is called the Leprechaun.
This is what the Leprechaun is going to do.
After this season, he is going to allow the Celtics to sign Dwight Howard. Howard won't know any better because, Lucky will cast a spell on him.
Since KG and Ray aren't ready(or should not) retire, and they don't want to play for anyone other than Doc, they will re-sign for another year for short money.
Now we have our Core Four plus Superman. Our bench will have Bass and Jeff Green. That will allow the Celtics to make another run. After that, we will have some serious cap space with Howard secure and some nice young players. This will allow us to bring in another max/fantasy player.
This will give us a long run after next year.
OK, be gentle, but don't forget the Leprechaun.