All very interesting questions and I believe the show hasn't really addressed them in detail yet, very vague. This is what the 100 wiki page says however it could all be speculation and not canon:

This sounds very Avatar, like with Korra and Aang communicating (can't remember details) with previous avatars. I also assumed there was something like this going on and perhaps they might delve into that mythology later on - it would be interesting to see/hear about different commanders. Speaking of, I'm not even…

Raven is up there as my favourite character on this show with Clarke. I want them to team up more.

I'd like to see more Murphy and Clarke interactions - they've had some unlikely scenes this season and once again, Murphy was present during a hugely momentous occasion (the first being Lexa's death) and was manually pumping an open heart to keep Clarke in the CoL. Their scene when Clarke thanked him was interesting,…

She had a huge role in this finale, I'm glad her relationship with Clarke was given some focus.

Technically Lexa didn't go out in a blaze of glory though - her actual death in the real world, which is the one to compare to with Robb Stark, Ned and Oberyn, was abrupt and tragic. I see your point though, that she was given a second chance for viewers to go out in a different way - but given it's a sci-fi show,…

Team up with Indra and form their own Kru! I think she'll be by Indra's side but it would be interesting to see Octavia strike out on her own for a bit.

Completely agree, unfortunately though, I do think they are going that route.

Agreed, this was definitely their intention before the episode aired and they witnessed the severe backlash that occurred - it was already filmed.

Arrow not giving the nuclear incident the treatment it deserves is not sitting well with me, especially since I've visited those sites in Japan and comic book universe or not, that kind of destruction is not just shrugged off or forgotten about - there are repercussions for years. They blundered big time with that…

I'll accept no other canon, that is fantastic.

Yes that's exactly it. Some strange editing at times.

Could've been the open heart pumping Murphy was doing…that made me a little nauseous!

If only Finn knew all he had to do was feel guilty for his crimes and he'd be alive…

That's an interesting interpretation on Bellamy, I thought it was strange to end the season lingering on him and I think you hit the nail on the head. I predicted weeks ago that his punishment or the consequences for his actions (as the writers see fit) would be losing Octavia - I hope the show follows through on…

I'm hoping Luna could make a reappearance and expanding the scenery to the ocean or coast would be something different.

Loved Continuum! Rachel Nichols is severely underused, she'd make a great spot on The 100.

so once Octavia figures out a way to get down from the tower

The Abby and Clarke scenes are some of my favourites - they act the hell out of them and Eliza Taylor and Paige Turco absolutely bring it. Their mother/daughter relationship is one of the, if not the, most important relationships on the show.

The look on Bellamy's face was priceless.