Well, there's a number of factors that come into play. The first is that it is unlikely-Not impossible, but unlikely-that Jordan is going to win 8 titles. The Rockets in particular were good those two years (Though there are arguments that the Rockets were only able to win those two titles due to the fact that Jordan wasn't there). 7 titles? Yes, I could believe that. Jordan would have to deal with a young Shaq in Orlando, as well as Pat Riley's Knicks and a young, talented Pacers squad, as well as a decent Cleveland team. That's quite a few obstacles to 8 straight titles. But....He's still Michael Jordan. So, at best, I'm saying that the Bulls reach the NBA Finals twice, both times against the Rockets, win one and lose one.
It also plays a major role in the expansion of the NBA if Michael Jordan is around for another two years.