Well, Richard Spencer has lots of support amongst the security services, like the Minutemen, who form a "parallel military" to the regular army, along with the more ultra-nationalist factions of the party. I could see Michael Flynn play kingmaker in a power struggle between Spencer and Bezos.The most likely to replace Bannon would be Bezos, he held a stranglehold over technological-financial parts of current day USA, being fifth richest man in the world help a lot.