TES is a single player game. It's not going to have multiplayer. Not in Morrowind, not in Oblivion, not in Skyrim, and not in TES:VI.
Summer has such a gorgeous Avatar Icon, doesn't she. No kidding, its what an Elf Lady should look like.
I will say though, I wonder if there should not be two threads for multiplayer. One for online multiplayer, and one for simple Local Co-op, as they really are two entirely different requests, with entirely different aspects and ramifications.
As to that last reply about ES being "a singleplayer game." Well, obviously, so long as they only offer singleplaying. But there is nothing inherent in the games or in the style of game that makes it HAVE to be singleplayer, other than the fact that it FAILS to offer any form of co-op. Even the massively rewarding, but minimally intrusive (upon storyline, features etc) LOCAL, DROP IN DROP OUT CO_OP. Drop in Drop out Local co-op Would NOT ruin the singleplayer aspects of TES. It would have no effect on the story, because the script and writing department is seperate from the tech department. What is more, if done in the normal way of optional local co-op, the main story and quest would still be entirely focused upon the princaple player. The feature would merely allow a player to have the great pleasure of being accompanied by a customized friend in the game world/experience, and would allow a friend to be an acctive, immeresed and further immersing part of that world, rather than a mere stand by spectator to someone else's game.
The only valid argument against allowing a local co-op OPTION is the resource and engine capacity argument, and that argument grows less and less plausible with every increase in technology and with every newer and more powerful engine and console. Any other argument is truly baseless, and is no different, no less selfishly provincial, no less asinine, than it would be for a person who plays only as a mage to say that all the armour and armour attributes should be removed from the game to allow for a greater focus on magic using characters, or a career barbarian player to argue that the spell menu should be dropped in favour of more melee combat options.
Outside of tech related resource/engine capacity arguments, any argument against the inclusion of something as entirely optional and as potentially enhancing to the overall emotional experience of gameplay as a basic, drop in/drop out local second player option, is an argument to LIMIT and RESTRICT reasonable player options, with no good motivation. If the addition of this type of co-op does not change the story, plot, quest length, spell lists, number of side quests etc. (and there is NO real reason why such a form of co-op would have to do any of those things), then its addition can only be a positive and an enhancement, and all who do not wish to play with it, all those who lack the social aptitude to appreciate being able to share an immersive gaming experience of this sort with a friend, all those who would actually, if given the chance to really enter a new world of magic, and intrigue, and epic quests and fearful monsters, would actually choose to enter it alone rather than take a friend along for luck, laughs and a familiar and dependable ally in the face of the great unknown, all those people will still have the OPTION of NOT using co-op and playing single player.
If a good RPG is really about having as many options available as the game can reasonably support within the confines of that game world, than to NOT offer the ability to have a friend play at one's side instead of some raggedy AI companion making a poor attempt to be a lame facsimilie of a real companion, is definitely a massive shortcoming.
Being able to have a friend come along with one in local co-op would in no way alter the essentials of the ES gaming world. Introducing machine guns would alter the essentials of the gaming world. Removing the Daedra, or making blatant changes to the lore, or taking away the spell options or customization options, those things woud alter and ruin the essential aspects of the world. Adding the ability to play within the world's parameters with a friend for an enhanced gaming experience. . . it would only enhance the overall positives. And it would NOT be mandatory, but the oppressive cabal of "singleplayer only" totalitarians don't want to admit that.