A couple of pieces of dialogue makes me doubt that theory now. Spoiler MiB seems to have known Arnold and had a personal hand in stopping the problem from 30 years ago. The MiB also mentions cutting open the old Hosts and marveling at their mechanical insides, meanwhile the Hosts Will and Logan encounter are of the flesh variety. Also Logan tells Will that there was another founder, but couldn't find out what his name was. Also I wonder if the Representative from Devos is Will or if it is the MiB.