Possibilities

Looking down at the body in front of me I was busy thinking… the opportunity to change the timeline, destroy one of the primary antagonists of the Naruto series and prevent countless deaths… was not very appealing. I would just end up delaying the inevitable, create a scenario I don't know and in the end gain nothing.

'If I just let the story take its course I'll gain much more… much, much more. This entire world will become my playground.'

As I continued thinking less than 1/10 of a second had passed, I had already collected the blood of Madara Uchiha and Hashirama Senju.

'Just to be on the safe side I'll gate the Uzumaki blood as well. This shinobis aren't very good at covering their tracks… though I doubt they expected to be traced with thermal sensors.'

With the recon aircraft in the air I was able to find the location of Mito Uzumaki, who had just given birth… weak, defenseless and slightly wounded. Utilizing nano-machines it wasn't difficult to gather enough blood. With this it should be enough to synthesize a new body of each of them and farm more blood and needed DNA for further experiments.

'During this experiments I will make sure not to create a brain for the subject… seeing as it is Madara Uchiha we are talking about who knows if he will come back to life… maybe just creating a body part will be enough.'

…

Creating the body with the added DNA of Hashirama, Mito and Madara wasn't a problem. The problem was the accelerated aging. For some reason it wasn't working as intended and always ended up with balancing issues . After a lot of experimenting the reason I came up with is that as I had no data on the aging of humans I lacked the necessary data to age a new body. After experiencing one time I should have sufficient data to age as needed.

'This will mean that I have to live 10-20 years as a human though. Destruction of the body during those years will cause the experiment to fail and I will have to restart. Calculating the best time to start the growth of the body and experience is prior to the 4th shinobi world war during the events of Naruto series. A high percentage of success is guaranteed.'

'Entering the world officially before this might cause a change in the predetermined characters and their roles. Entering Uzumaki household is impossible as only survivor is Naruto Uzumaki, interacting with him might cause a change in character and history... Entering as Senju will turn the eyes of the whole world and village upon me as a last surviving member and the only male… Entering as Uchiha member has the lowest impact… if there are 2 known survivors then 3 won't make a difference.'

'Research has proven that the difference between survivors is relative to the number of survivors prior and after. If there is only 1 and then becomes 2 the difference is calculated as huge in a normal persons personal opinion similar to: "There is actually 1 more?!". If there are 2 and one more joins people don't pay much attention and act similar to: "So 1 more made it."'

'Human mind is truly a complex, wonderful and stupid thing to study… Nevertheless there will be changes. While raising the body outside of human contact is possible as it is a biological body it might create emotional problems later on. Better to get this kind of problems dealt with sooner than later, while I can just create another body I do not enjoy having them destroyed. Wasting was never in my nature.'

'I am not stupid or overconfident enough to think that I will be able to combine an unlimited amount of bloodlines but elemental one's should be unnecessary… of course there is one I've had my eye on, the Shikotsumyaku. It grants the ability to modify the bone structure of the user and while it may seem insignificant at first for me it is very useful.. It is like wearing the and exoskeleton under my skin.'

That would grant me a major boost to protection as well as increase in strength and endurance.

'Somebody can always attack the weak spots, the opening between the ribs and go for the heart but what if under the skin there is no opening… there is no gap for the weapon to go through. It is a perfect addition to defense. In addition if the bones are reinforced with nanotechnology it will also be a great help. Though it's still too soon to add reinforcing effect to nano-machines in my body.'

…

The time is approaching, the Kaguya clan is preparing to attack Kirigakure, their show of ferocity, stupidity and my profit. The clan leader should be on the front line so I will be going to their residence and secure a sample of Kimimaro's DNA and blood.

As all the shinobi's of the clan were on their way to attack Kirigakure it war rather easy and underwhelming to say the least. I got in and out without anybody noticing me and got Kimimaro's blood without much of a problem. The boy was out cold and didn't seem to hear me going in and out.

Getting this kekkai genkai further ensured the security and increased the evolution potential of my soon to be main body.

My next objective was to get all the information about Fuuinjutsu from the Land of Whirlpools. As I've witnessed what they are capable of I believe it would a great weapon in my arsenal. Even if it isn't I will just keep it in a memory bank until I need it.

…

After a few years had passed I had only been able to normally age my body to 2 years old. Inside the tank the aging was slowed down so ic ould monitor in real time any changes and react to them in real time. This body is now 3 years younger than Itachi and 2 years older than Sasuke.

[A.N: I couldn't find the age difference between those two so I made it 5 years.]

'It's time to join the fray.'

At this moment the Kyuubi was unleashing hell upon the village. Waiting until the 3rd and 4th hokage pushed the Kyuubi out of the village I used a soldier bot to sneak my body in the Village. As the protective barrier was down it was relatively easy. Once my body was put down the robot took off and waited to be picked up at a discreet location.

Soon enough everything was over. I could see the towering figure of Kyuubi getting smaller and smaller. Later it disappeared killing both Kushina and Minato in the process. As the sealing process ended, I started to cry and got the attention of some Uchiha police force personnel.

As they picked me up, we headed towards the orphanage. Looking at them I slowly opened my eyes, showing them my fully matured sharingan. Certainly a rare sight especially for a 2 years old. They seemed surprised and while looking towards each other they nodded, took a robe and covered my eyes. Then I felt them stop and change directions, heading towards what I presume was the Uchiha district.

…

Going back 1 year to when I discovered the chakra inside my body I was a little surprised... for the entire year I had been trying to find why I couldn't feel chakra, why I couldn't sense a change between my body and the atmosphere. It was because my chakra was so large and bountiful it was everywhere near me. Unless I got at least 20 meters away I couldn't tell the difference. When I tried to control it, it was very simple. Just like the various machines which I created and controlled, that was how easy it was to move the chakra. I made sure to control it so it didn't leak outside anymore, as I directed it toward my eyes they started burning strongly… and as I saw my face through the eyes of a soldier I could see the 3 tomoe sharingan in my eyes.

An monstrosity as a baby I may be it was still tiresome so I fell asleep.

…

As we suddenly stopped I heard some muffled voices. I couldn't make out any words but soon the blindfold was taken off and I could see and hear normally. In front of me was a stern looking middle aged person.

It was Fugaku Uchiha, the current head of the Uchiha clan and he was looking at me… with his Mangekyou Sharingan.