The answer to this question is a big no. Bitball will have to replace no other coin, much less Bitcoin. No other coin will be able to replace Bitcoin, neither today nor in the future. Bitcoin will continue to be the one and only Bitcoin. It may not be the best in terms of fundamentals in the near future but it will still be treated as the top-rated coin because it is the one that made the path for all including Bitball.

Bitball is just a shitcoin, one among thousands of others. It will grow if it replaces its being a shitcoin with a better project. It will have to compete against itself first before competing directly against Bitcoin.