Summary:

[spoilers]
- Feudal saga is over. Hiro blows up NPH, but obviously he has regenerative abilities. I expected him to still be alive, but the ending still surprised me (read on)
- Parkman's storyline with the Boogey man is over, it seems. Looks like Parkman's powers are like his fathers' , though I have no idea what it is exactly
- Peter's visit to the future ends abruptly, separated from his love interest. Very curious how this will be resolved. If they change the present the altered future cannot be accessed by time travel any more
- NPH, supposed to be alive, manages to live until the present. Looks like those who argued he is Linderman are wrong.
[/spoilers]

NPH = Neil Patrick Harris. Think about it.