Should Umbra be in skyrim? with an owner? Or maybe it should be found in the tomb of the Champion of Cyrodiil from 200 years previously?

Should there be any new guilds or factions? or stick with the known ones (above)?

There's no way most of these even COULD be in Skyrim. They're (long gone) institutions specific to a very certain time and place. Like the Knight Orders, or the Order of the Virtuous blood. Those won't and couldn't exist in Skyrim, it wouldn't make any sense, there's no way.
It'd be like finding a Telvanni Tower in Bravil.

And you may not have known, but according to lore, the Mages Guild was disbanded shortly after the events of Oblivion, when the Empire more or less collapsed.

Cammona Tong and Morag Tong are also almost certainly out; It's pretty unlikely that those organizations would have survived the destruction of Morrowind, or made it over into Skyrim.

Since the vast majority of known guilds won't be there (and shouldn't be there), I obviously strongly hope we get a lot of new ones.

I'm especially hoping for political guilds involved in the civil war.

Ok, I didnt know about the mages guild. But I am sure we will have a form of Fighters, Mages, and Thieves Guilds. They may not be called that, but there will be most likely the standard Combat/Magic/Stealth guilds I would say. And of course some others. I really want some new, unique guilds though. Not guilds just based on combat/magic/stealth. Maybe not even based on combat at all. I would really like something akin to Raven Rock from Blood Moon, or something similar. It felt satisfying building that town up, and actually having some somewhat meaningful CHOICES.

As for Umbra....I think you know who the owner is.

+1
tho there could be some kind of replacement for the mages guild
and the fighters guild, thieves guild and mages guild have been in the TES games at least since daggerfall
im sure they will be back, maybe in a different way but theyll be there
as for other guilds, im sure theyll add some Skyirim- specific ones that wont be appearing in VI

Yeah. There'll definitely be guilds for each of the three archetypes; mages thieves and warriors. The Mage's Guild will probably be either the College of Whispers or the Synod, or maybe both.
I expect a lot of guilds specific to Skyrim.

The Knights of the Thorn? They were a bunch of kids with the spoiled son of the Cheydinhal Count as their leader, and all they did was boasting about all the heroic deeds they never did.

And the one time they decide to do something the Champion of Cyrodiil had to save their asses.

Guys, this isn't a serious question. It's not 'which guilds will appear in Skyrim'

its 'which guilds should appear in Skyrim' (in your opinion)

ooooh. Well then I need to change my vote.

I don't really care if umbra made an appearance in Skyrim. I hardly used it in Oblivion. As for factions, definitely Thieves Guild. I also want to see the return of Morag Tong.

I'm not entirely sure if the lore would line up, but I want to see the Black Hands again.

Morag Tong Armour = awesome!

I think we all know that the Knights of the Thorn will be in Skyrim. Those guys were such great heroes, the legend of their founders will have lived on through the 200 years to the present and made their way to Skyrim, where songs of their deeds are still sung. The Knights of the Thorn will live on all over Tamriel, accepting only the mightiest of heroes, and the player may only join after stopping Alduin from eating the world. Certainly.

Oh yeah! Another redundant poll that even the OP agrees is a waste of time

Almost all the Guilds in the poll will most assuredly not be in Skyrim, as others have stated.

I would prefer some other great warriors as opposed to Umbra for a change. As much as I love the idea I don't want it to be over used.

I'm glad to hear that a lot of these options aren't possible at this time in Skyrim. As much as I like some traditions, I'm looking forward to getting to know some new factions that are unique to Skyrim. If there are opportunities in-game to learn more about the elder scrolls' universe, I'm there.
As for umbra, I'd like to see it, but I hope enchanted weapons don't look so oily. Also, I wasn't a big fan of the purple sword. I hope some of the colors of weapons and armor are a bit more subdued this time.

Yes i think that Umbra should make an appearance, it has been in most (if not all) previous games. But I think their should be a twist, not just the usual overpowered owner to defeat.

We already know that the Mages Guild has been broken up into 2 seperate guilds from the lore, I just hope we can choose which to join not have both available.

And I think we should have another or the Assassin Guilds available, if not to join then at least as a competitor against the DB

I'm hoping for joinable clans like the great houses in Morrowind

DB?

Quite true, many known factions simply wouldn't make sense in Skyrim, but that's fine because Skyrim gives us room to introduce new factions, being not only a different province but also 200 years after Oblivion, giving time for new factions to rise, potentially replacing old ones that are no longer around. I want to see factions that make sense in the game, and new ones are perfectly fine with me.

I expect to see the basic three guilds or their equivalent, if nothing else. Given the lore about the Mages Guild seperating into two factions, that actually allows for two Mages Guild equivalents in Skyrim, though that doesn't guarentee Bethesda will take advantage of it, it may be that by the time of Skyrim, one of these factions no longer exists, or it may be that only one is actually joinable, only time will tell, I don't think we know anything about what happened to the Thieves Guild or Fighters Guild, so there's room for the game to fill us in on that, the Dark Brotherhood has been confirmed, still, there's some other options left, one thing I'd like to see is being able to have the sides in the civil war as joinable factions, they could be similar to Morrowind's great houses, like those, you should only be able to join one with a specific character.

As to Umbra, I see no reason why it shouldn't return, 200 years is more than enough time for it to find a new wielder, after all.

What about Dawnfang/Duskfang? will that return?