In response to Fierce34's comment:
In response to ktronic's comment:
Lakers, Pistons, and Bulls.
The Magic Johnson Lakers era ended in 1991. After losing to MJ in the Finals, Magic retired and the Lakers only went back to the Finals, led by Shaq, in 2000. So 1991 to 2000 is 9 years.
Isiah Thomas last won a championship, with the Pistons, in 1990. The next time the Pistons made it to the Finals, led by Billups, was in 2004. That's 14 years from one Finals to the next.
MJ's Bulls last made it to the Finals in 1998. And so far the Derrick Rose led Bulls haven't made it to the Finals yet. They came close in 2011 when they faced the Heat in the 2011 east finals.
Superstars are hard to find. It took the Celts a decade to get Paul Pierce. Then it will take another 5-7 years for that superstar to be ready to compete for a championship.
Like I said, history tells us it will take more or less 10 years.
+ 1 the Cs will be developing talent and rebuilding for a while. On the topic of rebuilding, I hope they select Giannis Adetukonbu in the upcoming draft!