Re: Team senju vs team uchiha
I'd say team Senju. You have to realize two of the three Uchiha's are going to go blind, as a matter of fact Sasuke wouldn't even have Mangekyou if it weren't for him killing Itachi so strike out the three gods Susanoo, Tsukuyomi, and Amatersu from Sasuke and put him where he was before all of that and that's not at a Kage level yet. He's powerful but not where he was when he fought the 5 Kage (where he was almost killed in that). Now for Madara, it all depends on how he's fighting. He was defeated once by Hashirama and now I'm sure he doesn't have the Kyuubi to smack around. He has EMS, the only one on the team to have that power, which he had before he fought Hashi, the first time (I assume from the way the story was told), and as far as our current knowledge is he doesn't know how to use Susanoo or the other Mangekyou power jutsu but I'm not ruling them out. Somebody said that Madara had the Zetsu's, well that's not really a fair fight we're talking about three on three and plus the Zetsu's were made from Hashirama's cells so I think Hashi would be able to handle them or they wouldn't even exist if he was still alive so...yeah. Itachi, assuming he still has his disease would die out soon and even if he doesn't he's going to go blind half way in the battle with standard MS. Blind shinobi isn't usless but if an Uchiha who's fighting style relys on at least the basic Sharingan it means certian death soon.
Now for the Senju side. We have Shodai, only seen fighting in dead form against Hiruzen, however first hand testimony from Madara himself of his power to defeat him at his fullest leaving him a shell and was also the first man to control all Bijuu and distribute them. Tobirama is sketchy however more of him has been seen and heard of then his brother. We see the power of his Water jutsu, he had the Thunder God Sword, some space-time ninjutsu and Impure world ressurection (However he'd never use this). I'm not sure on much else so he's an iffy against either Madara or Itachi. Tsunade is valuable with her medical jutsu, and power only. She'd provide cover and defense and use her summoning to refule her Grandpa and Grand uncle but not much else. Now to be fair I'm going to point out weaknesses I can find in the Senju since that's what I did mainly for the Uchiha's. Tobirama and Hashi, not much seen, and Hiruzen managed to defeat both of them in his elderly form although it can be assumed that he's become stronger since their time when he was younger. Tsunade is...well you can fill in the blanks about her weaknesses I've talked long enough.
Final statment: Madara with EMS and Rinningan (I forgot to mention earlyer) would tip the scales. Itachi to the fullest extent as seen when he fought Sasuke (Although he wasn't trying to kill him he was throwing full force on him), Sasuke weakened because Itachi's still alive so only standard power however he still has Kirin, which could kill his teammates as well (although Madara could use his Space migration and to same fairness Tobirama's space-time technique(s) might have some impact). Hashirama, wood release and overall powerful dexterity as speculation could deal with Madara, outcome may varry if Madara has Rinningan. Tobirama's powerful water jutsu, varried power in Space-time, not much else known about him so again iffy, and Tsunade with her medical jutsu, to recharge and possibly poision one or more of the Uchiha's (By her poision I mean giving it to somebody who can do so like her teammates). We have mostly rep for the dead Hokage, and disappointment from the live Hokage. Madara (The whole he might not be Tobi thing, is getting to me but I still hold faith he's Madara so mood point), depends on where you put him in power, Itachi fatal flaws with MS, Sasuke just like Tsunade irrelivent at this point. Really it's a battle between Madara Itachi vs. Tobi and Hashi, and I just picked my side because I'm tired of the Sharingan and I feel it makes more sense.
Damn this is a lot.