In 2 weeks (if it goes thru) he will own NO shares of the company. So there's no shares or bonds of his to sell. No board to direct him or remove him. No shareholders. Nothing. He owns it completely just like you own a pair of shoes. Nobody can do anything about the decisions he makes. Those days are over (not that they ever really existed since he owned >50%. Now he owns 100%. No banks own anything. They loan him money but they have no say in anything unless he defaults on loans.
The days of removing him are gone. Just like your neighbors can't remove you from your house because they don't like which bedroom you choose to sleep in.
Sadly, very true post by @Xdd1pgm-1zvb.