What I think most people are overlooking is Sai, as odd as he is, I would say he is one of the strongest from the 11.
The benevolent kings drawings had enough strength to destroy Deidara, I believe they could do something with Susanoo, if not atleast give the others time.
Do I think Sasuke could win? yes, he has the killing instinct while the others will most likely try Talk no jutsu or be torn. The hard part is knowing what sasuke can do in EMS, I believe atleast 1 of the 11 will die quickly, and I feel shikamaru would be his primary target because Sasuke had a decent amount of information on him.
Keep in mind that when it comes to taijutsu I believe only lee can surpass him here, neji would be up there too but Sasuke has shown excellent fighting ability with multiple targets, and he knows 90% of their techniques.
Anyone who says "they have learned new abilities", keep in mind that he was with orochimaru, a person who keeps tabs and information on everyone, I am sure he leafs 11 was a prime target for him. Then again 90% of this is speculation so take it as you will just my opinion.
One thing I will put out there, people keep talking about his chakra levels, but when has sasuke ever had a problem with Chakra?, in the fight against danzo of course he was exhausted, he had to kill him 100 times lol, even itachi was surprised he survived Izanagi, and he only believed sasuke saw it once, but then again plot no jutsu lol
He would probly lose, they all have worked together for so long, but until we see more of his abilties wth EMS its hard to tell, if he goes for throats asap he may be able to dwindle their numbers down but take my word for it Sai would be the biggest wildcard here, He can stay at a range and his bird is pretty fast, snakes can move under susanoo, and if not im sure he could draw something that could. With the others attacking him, it will be hard for Sasuke to watch Sai's bird bombs. and of course when Sasuke's attention is pulled from Sai, he can drop the Benevelont kings on him as he did against Deidara and Sasori, and we all know how that ended.
So conclusion, situational at best, Sasuke if he goes for kills early and they try talk no jutsu, if they come to fight then the konoha 11, but only if they are looking for blood, because sasuke will be