I'm getting sick of such speculations that are obviousley wrong....
1. tobi is madara who is immortal, and hence has a young appearance.... danzo is old
2.if he was tobi/madara, he would be an original uchiha not needing to cover his eye as he would be able to control wether the sharingan is active or not
3. he is not obito and he does not have obitos eye, i explained this after the spoiler for this chapter came out in the last predictions spot (go there for kakashi gaiden links for you who need proof) but obitos right side was crushed, before kakashi got his other sharingan. soon after this another rockslide occurs smashing what was left of obito.
in truth im more intersted to see what happened to Rin after the events of gaiden, she could have left the village and become mizukage..... about the right age temper towards men could be caused by kakashis denial of her etc etc. lol just kidding there is NO way that Rin is mizukage hair color is wrong, she didnt act like a medical nin, etc.
so anyway please quit the uchiha connection speculation bull everyone else that knows its wrong is getting sick of it, im open to ideas just not when ive proved it wrong too many times
I knew this post would get a rise outta someone...so in my own defense I offer the following counter points....
1. You ASSUME that Tobi has a young appearance, but the only part of Tobi we see is his hair, toes, sharingan eye through his mask and a sliver of his face in a shadow ONCE when he was filling Sasuke with the misinformation about Itachi. What YOUNG appearance is there really. He ACTS young and immature when he was rolling with Dieadara, but that is just an act...I guess to infiltrate the Akatsuki and take it over. So again...what appearance?
2. Your 2nd point only proves that YOU believe that Tobi is Madara, so based on that Danzo can't be Tobi. I think that Tobi(DANZO) on CLAIMS to be Madara. DANZO/TOBI is the ultimate liar, double-crossing, deep-cover, double agaent spy-like ninja. I mean he runs ROOT. Him pretending to be someone else is not that big of a stretch.
3. I agree that odds are he is NOT Obito, but I think Kishi is using some pretty good mis-direction to keep us guessing (Right side injury, gnarly looking sharingan eye, etc.)...but it is not impossible. There is too much we don't know to discount it as a possibility. It is very possible that the Sharingan eye did come from obito before he totally expired, hence the damaged appearance. Eitehr way neither is impossible. All Kishi has to do is come up with a jutsu that we have yet to see or another plausible means. I mean look at what there is so far...PAIN ressurected the whole village and could limitlessly ressurect his other bodies, Oro is being ressurected through DNA mixing with Kabuto, Gaara received a Life-transfer, Jinchuriki can basically come back from being almost dead, Oro raised the 1st and 2nd using a forbidden tech, 4th Hokage and White Fang are hanging out in Limbo whenever thier sons are almost dead....come' on...based on these things, the Tobi/Danzo/Obito/Madara thing is not THAT crazy.
Besides what ZETSU. We don't know $#it about his powers yet. He is a scavenger, collects bodies, pops up out of the earth wherever he wants. A fresh sharingan eye could be easy pickins' with that guy around (just a guess...)
Lastly (another speculation, but still possible) consider that Sharingan eyes matue differently and produce different effects based on the user. Sasuke's eye does not do what Kakashi's eye does (space/time), and I don't think Kakashi can pull of a tsukoyomi or amaterasu. Danzo's eye might allow him to project a version of himself anywhere. Instant teleportation, attackers pass through him like a shadow...
These speculations could be wrong...but as you stated.....OBVIOUSLY wrong?...I don't think so.
I respect your opinion so if you turn out to be right, I'll post saying so, but if I am right you have to do the same!