No need to rewatch. They obviously lost all credility. The difference between Philip K. Dick novels and Westworld screenplay is that Dick's apparent complex and ambiguous denouements have always a meaning. The man in Black last scene is a pure mockery. (To answer
Grand Potentate
) Of course, since it has no real justification, it can mean everything : first hypothesis the Man in Black died during the main timeline of the 2d season and the last scene take place in the future where Delos is trying to resurrect the Forge project; second hypothesis the Man in Black was a robot from the start and the whole series was a big simulation made just for him, the hosts revolution included ; last hypothesis the screen writers had no fucking idea how to end the mess and tried to find a smart cliffhanger which has absolutely no sense. The last hypothesis is the strongest from my opinion.