ummm Pein alone flattened the village into dust. add 8 more Akatsuki members and there's going to be absolutely nothing left.
Akatsuki has 7 of the tailed beasts and the Jyuubi as well.
does that include Sasuke's group and Kabuto? if so EDO and Sasuke are gonna wreck things up big time!
VERY LOW DIFFICULTY-
Naruto would be the only major asset to deal with and he couldn't fight all out because it would kill everyone around him :O
Yes, but the village does not have the same people that were protecting it when Pain attacked. When Pain attacked, there was no Hashirama, Tobirama, Hiruzen and Minato. In addition, Tsunade did not take an offensive role so could not participate in battle. A combo of The Kyuubi, Minato, Naruto in Sage Mode and his toads alone were able to take out Pain without using their ultimate powers. Naruto and the Kyuubi seem like enough to take on all the tailed beasts; all 5 Hokages being present provides incredible power that should be more than enough to deal with arguably the most powerful people in the series, Edo Madara, Kabuto, Nagato and Tobi.
Edo Tensei is not really that much of a threat when Tobirama - the original creator of it, is around. If Madara was able to out-manouvere it as a consequence of simply being from around the same time period as the original creator, I think the original creator's going to know how to stop it pretty quickly, which reduces any threat Kabuto has with his Edos.
Tobirama > Kabuto. Also, will Dragon Sage Mode really be a problem when Kabuto is getting washed/swept away by an infathomable amount of gallons of water even with Taka and the Sound 5's abilities? Can all 9 of them withstand an extremely powerful and heavy tidal wave? I don't think so. Even Suigetsu would get washed away.
If Madara is an Edo, most of the Kage have sealing techniques for him and Hashirama provides the perfect counter in battle for Madara. I think
Hashirama and Hiruzen can > Madara. Minato and Kakashi are the perfect counter for Obito, so
Minato & Kakashi > Obito.
If Obito is defeated, the Tailed Beasts are no longer a problem, except for Nagato. Sealing would work well against Nagato too, but it will just take somebody clever and powerful like Itachi with some aid from a good support ninja to get that done. I dunno if Jiraiya is allowed in this, but if Jiraiya was present, Jiraiya + Itachi > Nagato. But if not
Itachi and Naruto can > Nagato, with the Toad summons helping, Kyuubi on board - providing Itachi with chakra so that his powers are optimised. The Kyuubi and the Toad summons should focus more on the beasts whilst Naruto and Itachi should focus more on the Uber-powerful Nagato.
I agree with the
Rock Lee > Hidan,
Gai > Kisame,
InoShikaCho with help from Asuma > Kakuzu (and maybe Kotetsu and Izumo or whatever they were called),
Itachi > Diedara analyses. In fact, I think Itachi could swiftly (as he usually does), take out Diedara swiftly as his first target before moving onto someone else.
Konan, Sasuke + his group and Sasori are actually the biggest problem and hardest to defeat. The reason Sasori was defeated quite relatively easily was due to Chiyo knowing him very well and Sakura having the antidote, or else he would have been almost as difficult to kill as Orochimaru. Consequently, Sakura doesn't have much chance against Sasori alone, but I think Tsunade, whose a better version of Sakura could take him. However, she'll need a swift analysis of Sasori by someone very clever, so I think Shukaku should actually help her fight Sasori.
Tsunade + Shukaku > Sasori.
I think Shino is the perfect counter to Konan because his bugs could locate all her paper parts, but he would need someone to distract her and keep her at bay - fire technique shinobi like the Sarutobi Clan.
Shino + Sarutobi Clan > Konan.
I think Neji and Hinata will to take on Jugo to disable his chakra points, as it will be the only way to put down the very physically strong guy.
Neji & Hinata > Jugo. I think Ino's dad - the expert mentalist can deal with Suigetsu because physical attacks are the worse way of dealing with Suigetsu, whereas mental would work much better.
Ino's dad > Suigetsu. Tenten should take on Karin, maybe with some help from Kurenai.
Tenten & Kurenai > Karin. But Sasuke is the problem.
If Danzo is allowed to help Konoha too, this will give them the edge against Akatsuki because if Danzo gets to use Torune and that other guy as well, without Tobi's interference this time, he has Sasuke's defeat in the bag cos the Danzo/Sasuke fight was quite close. With some help, Danzo has this.
Danzo > Sasuke. Alternatively,
Danzo would have K-A because he wouldn't have used it on Mifune, so he could one-shot Sasuke, allowing him to move onto bigger enemies, and if this leaves Torune free, he can help his relative Shino in defeating Konan.
The Juubi initially poses a huge threat, but if Minato can FTG it very very very far away before it begins its' assault, it's dealt with until later. (I don't mean that Minato follows the Juubi where the FTG takes it though, since Minato has to deal with Tobi).
FTG > Juubi
Now, the final problem: Zetsu. I dunno why everyone underrates this guy so much. In a war situation, where he's been cloned 100,000 times and has the ability to imitate others' techniques to become precise copies of them with all their powers, he is easily the biggest threat in terms of numbers. So the only way to really counter him is numbers. Because Naruto would be busy with other enemies, Konoha will just have to send their numbers against the 100,000. Of course, this is nowhere near enough, so to help numbers, Choza that huge guy should be a main force in this army of fodders. So should Sai, Root and anybody else prominent who either does not have an opponent or has finished up their fight with their enemy. I think Danzo would be of great use here and would probably die at some point.
Choza, Kiba, Sakura, Sai, Danzo, Root and Konoha Army > 100,000 Zetsus.
Yamato should take on the main White/Black Zetsu, since its' pointless for Zetsu to copy Yamato's powers and Yamato has all of Zetsu's powers to counter. But he probably won't be able to last too long before Yamato loses/dies. Then I expect by this time that the Sarutobi Clan would have finished helping in their fight with Konan and will have come along to take over Yamato's fight and use fire style to completely overwhelm Zetsu. Since he's wood, a rapid intense mass of fire big enough to eradicate a forest in seconds from the Sarutobi Clan should take him out.
Yamato and Sarutobi Clan > Black/White Main Zetsu
Once Konoha has finished their battles with their particular enemies and Naruto has dealt with all the imposter Zetsus, I think they'd be ready to take on the Juubi, who won't be under anyone's control since Nagato, Madara and Tobi will all have been defeated, killed or sealed. I expect a lot of Konoha ninja to not have survived and I reckon a one final battle with the Juubi would kill most of them even though I do think they'll win and seal the Juubi, considering Naruto and Hashirama's tailed beast taming powers.
Whole of Konoha > Juubi - primarily Naruto and Hashirama
So in the end, I think Konoha will win, but only just, and they'll end up wiping out most of their numbers and forces in the process, thus meaning that in the long-run, Akatsuki would have succeeded in more or less eradicating Konoha or its' forces, but Konoha would have ultimately won the battle.
Summary
Tobirama > Kabuto
Hashirama and Hiruzen > Madara
Minato and Kakashi > Obito
Itachi and Naruto > Nagato
Rock Lee > Hidan
Gai > Kisame
InoShikaCho and Asuma > Kakuzu
Itachi > Diedara
Tsunade + Shukaku > Sasori
Shino and Sarutobi Clan > Konan
Neji and Hinata > Jugo
Ino's dad, Kurenai and Tenten > Suigetsu and Karin
Danzo > Sasuke
FTG > Juubi (initially)
Choza, Kiba, Sakura, Sai, Root (eventually Naruto), and Konoha Army > 100,000 Zetsus
All of Konoha - with Naruto and Hashirama at forefront > Juubi