wouldn't you think that when the financial aspects of it really start to make sense, some of these ultra big name schools that lack MBA programs like Princeton, Cal Tech, Tufts, or Brown will consider doing something? These are all the type of school that could immediately become an Elite school virtually overnight.
I don't see how this can be a "zero-sum" game. With populations constantly increasing globally and the booming of India and China and the interest individuals in those countries will have in Top US programs (as well as ones in the EU and their own countries) it would only make sense that more schools will make it to that top tier.
At the same time though, the tip-top, the H/S/W type schools will probably become increasingly difficult to get into. Maybe a better way to think about it is that there eventually will be a tier above the ultra elite, the UUE which in turn will open up doors for new UE schools.
Now, to truly address the posters original question, i think another school which is on the rise is William and Mary. They've made big strides in there program of late and have a very strong name associated with the college.