I just read a big article in official PlayStation magazine about AC: Brotherhood and sounded pretty cool. 
The story behind the multiplayer is you and everyone else are modern-day Templars using the animus to train. 
The one mode they explained in the article was called "Wanted". Six to eight players pick charaters like doctor, noble, priest, prowler, cortisone and couple more. 
Then they get dumped into a city and given a target like "go kill the player that is playing as a doctor". Now you say how are you going to sneak up on a real player? 
Here is the thing I thought was actually smart, your not the only  doctor, noble, etc in town. There are like a dozen or so NPC doctors just going about there business and it's your job to find the player controlled one.
 KIlling your target gets you XP and evading your assassin gets you XP, You level up get new equpment and special equipible skills like turning into a different charater than you chose for a few minutes. So I think it actually sounds pretty neat and desmon is in the single player, so the actual main story of assassin's creed will actually be pushed forward some.

You seemed like a pretty good idea, but then you were born. 
 
I KID! 
 
I just wish they would do AC3. They can't keep me waiting on such an AMAZING cliffhanger like that! (Best ending in video games, right there.)

" @xyzygy: well one other good thing that was said in the article, is that the combat will be more like batman:arkham asylum "

Is Nolan North in the game?

" @trophyhunter said:

" @xyzygy: well one other good thing that was said in the article, is that the combat will be more like batman:arkham asylum "

I am now 10 times more excited for this game. "

" Is Nolan North in the game? "

Hold on. This is a standalone title and not DLC? Madness. Then again, I sold AC2 because I found it to be horrifically dull and I scarcely, if ever, like selling games.

" Hold on. This is a standalone title and not DLC? Madness. Then again, I sold AC2 because I found it to be horrifically dull and I scarcely, if ever, like selling games. "

sounds like hide and seek. 

Sounds really good... Can't wait. Still need to finish ACII though.

It's cool that they're trying to tie the multiplayer into the story.

that sounds like an unreal twist to this game, im so excited im playing the 2nd one again in preparation!!