I am certainly hoping to see some good upset matches being made in this World Cup. remember when the last time a lot of teams competed in the World Cup? It was the 2007 ODI World Cup. And a lot of things that are really weak in power were actually able to beat some very powerful teams in the World Cup. So I am expecting something like that to happen in this World Cup as well. I am not saying every match is going to be competitive.
There are a lot of cricket fans in the United States, but hardly anyone among them support the US national team. All of them are supporters of India, Bangladesh, Pakistan, West Indies.etc. The market is there, but it is useless to assume that including the US team in ICC competitions would make a difference.