I don't know what's coming next week, but this is fun!
One thing that really struck me was the music. Donald starts the music box mechanism for his son, who continues winding it. Then Windmark starts the "radio" playing, followed by the other Observer tapping his foot, though it seemed to confuse him. It makes me think the boy has something "musical" in store for Windmark and his henchmen. The scene also had Messianic overtones for me. I also remember someone mentioning that it would be Walter who would sacrifice himself to save the world. That appears to be part of the plan, though I suspect a twist may be in store for us. And red universe Olivia may make an appearance! Will we see Henry? Will Henrietta return, as Olivia seems to think?
I'm going to start watching the whole series over as soon as the season 5 Blu-ray set is released.