What would happen if Google was never invented?
Yahoo would suck a little less. (We would probably use other search engines.)
This is impossible and will never happen. The FCC would never allow Google to buyout the amount of business required to do that, and that's only domestically in the United States. There are a number of small businesses Google wouldn't be interested in buying, most international small web based businesses. Therefor Google will never own the entire Internet.