The way I gather it, it was Ford that had the maze implanted. The Indian bot saw a maze and it started him on the path toward sentience -- at which point the Indian bot started reproducing it to do the same thing to the other bots who would come along and see it.
What if none of 'em is even there? Like... what if it's all... Inception-ated, and all the guests are jacked into the Cradle, and all the 'bots are just NPCs who are getting smarter 'cause they been playin' with the real humans?
That seemed to be the direction his character was taking. Does that mean he'll menace Delores and Bernard once he goes back to the real world? Will he become some kind of anti-hero who helps people fight the host invasion? Maybe Bernard will have to choose between the monster man created that is Delores or the self created monster that is William.