Jihan is the public face, but he isn't the only one in charge. Bitmain's support for BCash has approval from various board levels, and I don't think that anything will change. It's a very important part for the company itself in terms of selling more miners, and they obviously are the largest holder of BCash.
It's a circus show to fool regulators and have them approve their IPO. Jihan behind the scenes will continue to have as much power within Bitmain as he always had.
Jihan has around 20% in Bitmain, where Ketuan Zhen is a few % shy of owning 40%.