The many different ways Harry Potter could have been raised.
Family matters.
It's a little known fact that many ancient and respectable clans from the Japanese unplottable region known as the Elemental Countries had married out and were often the root of many ancient clans. One of those clans, coincidentally, was the Potter clan with the Uchiha. Also, due to the need to keep track of all possible recipients of the Sharingan, Madara had, with the aid of a couple of goblins and a Potter wizard, created a scroll that tracked the location of Sharingan wielders and potential possessors throughout the world. Of course, the scroll rarely came into play except to confirm bloodline potential (and it was usually considered a bit screwy after Obito Uchiha was shown to possess the potential for a Sharingan) but it was still a clan duty to monitor the potential for outside blood to develop Sharingan powers.
Fugaku Uchiha looked at the small old man with the steel grey bush of a beard. He was stooped over, and there was a pervading smell of mouldy paper that he didn't find enjoyable.
"Who, exactly, are you?" The old man gave him a dirty look.
"Fumio Uchiha. I'm the Keeper of the Bloodline Scroll- the scroll that determines when an Uchiha has the potential for Sharingan. It's vitally important that I tell you about my latest discovery." Fugaku gave him the trademark Uchiha glare.
"We're still helping rebuild the village after the Uchiha attack, and we need all the help we can get, especially from an old man who I don't even remember."
"My position requires me to stay near the scroll at all times. Anyway, it's happened. An outsider of the main Uchiha clan has the potential to develop the Sharingan." Fugaku raised an eyebrow slightly at that. A Sharingan manifesting outside the clan was usually almost impossible, but then again, it had happened before.
"I'm glad you told me of this. Who is it?" The old man coughed, and straightened his robes.
"A young boy called Harry Potter. Hasn't been born yet, but will in about two days' time." Fugaku's eyebrow climbed higher in interest.
"A Potter? As in the derivative clan in the west? How very interesting. No Potter has ever manifested the Sharingan before. Where is he?"
"Currently in England, I should say." Fugaku sighed.
"We lost a lot of good clan members in the attack. We could always use more."
"Right you are sir."
Itachi sighed as he chased the giant in his small flying machine. Due to the distance between the Elemental Countries and England, he'd taken a ship to the mainland of Japan, then taken a 'plane.' It had been an absolute nightmare, with English speaking tourists all around, babbling about 'J-pop,' and 'Nintendo' and all sorts of things. The fat man with the unkempt neckbeard beside him had been trying to speak to him in fragmented Japanese to tell him that he had a pretty mouth, but Itachi had mimed to the man that he was a deaf-mute so he could get some sleep. Now, he was currently in England, and as soon as he found where the boy was, a giant man had picked up the baby and placed him on a motorcycle. Fortunately, Itachi had managed to take a pair of binoculars, and with the help of Sharingan aided eyesight, was now driving a stolen car in order to make things easier on himself. There was no way that he was using the Shunshin across a whole country.
Two cars later, and Itachi was exhausted from running the rest of the way, but the giant was touching down in a suburb that was known in the English language as Little Winging. He listened in on the conversation, and found himself slightly disgusted at how cavalier this Dumbledore fellow was. He wanted to leave the boy here, where anybody could take him? Fine. He waited until he was definitely sure that the old man and his entourage were gone, then ran forwards, picked up the baby, and ran to a civilian car, quickly kicked the window in, disabled the alarm, then drove off after hotwiring it, baby on board.
Dumbledore was busy writing a small memoir to his fallen Order of the Phoenix members when Minerva burst in.
"Harry Potter has been taken!"
"What? That's impossible. Only those who share more than half his blood should have been able to grab him through those wards." That ward scheme had been quite the achievement, and disabling it was far beyond the skill of the Pureblood wizards that had been part of Voldemorts' inner circle.
Itachi sneezed, and noticed that the cars' fuel gauge was currently in the red. Quickly parking it, he jumped out, and applied a Henge so that he looked like a fat father with his small child. Airport security wasn't a big concern, and he was now on a flight to Japan. Beside him, Harry Potter slept soundly, unconcerned by the sound of jet engines- he'd slept through worse, after all.
Meanwhile, Dumbledore was about to lose all hope when he felt the blood wards take hold in wherever Harry Potter was currently. This meant that whoever had abducted him was close enough family that they could look after young Harry. It also explained how they'd beaten the wards- they were closely related enough that the wards were so much marsh gas. At least, if Harry's blood wards formed, then he could be protected from the worst in the world.
"This the brat?"
"Yes, father."
"Stick him in the standard clan training program when he's five."
Authors' notes: A prize and mention for whoever can first tell me what Fumio's name means in Japanese. Next time, Harry Potter is adopted by Mr. Bean! Edit note: Yeah, jsut thought of this.
I do have other fics out there that I could update, but I'm having so much fun writing these.