Just about everything that's been written says he will. Once he was seated, it's his seat. Then there's the Chicago employee fake police being allowed on the plane.
It just keeps getting better. Except for Dr. Dao, whose face has been rearranged by Chicago thugs on payroll.
Check out the terms of the contract the phoney drama queen agreed too, specifically the sections on why he can be kicked off and limitations of damages.
Add in the videos of him setting it up before the incident show its a shake down.
https://www.united.com/web/en-US/content/contract-of-carriage.aspx