I have a bit of a question on why you'd want an OC. I feel like this is an interesting story in a number of ways, and that tossing Team 7 an OC-sensei makes it a lot more likely that it'll turn into some sort of a "Kakashi died, and so we're all more badass now" - which seems poor to me. Let's think about this for a bit, and see if we can't come up with a decent character from the series first - or at least a character that fits into the mainstream of one of the well-known families, rather than just cramming in levels of generic badass.
The kids are traumatized. Also, the Hokage fully realizes that there are not one, but two psychologically fragile Strategic Assets Of The Leaf on this team, and that the idea of having someone who could train Sasuke in the sharingan is pretty much torched unless he does something like call Itachi back home. For the moment, what he's looking for is someone who can put them back together again psychologically (as competent ninja first, and well-balanced people as much as can be managed after that), keep them from going rogue, and not let their training fall behind too far. He probably saw Sakura as someone of limited long-term value who's on the team because she's not all that important and therefore won't take up too much of sensei's time. He's going to have a hard time matching Kakashi's combo of Obito/Minako-driven personal loyalty, obsessive team-identification, hypercompetence, and understanding of broken, broken children, so perhaps it's time to take another strategy.
So what sort of a person does he want to hand them to?
The kids are traumatized. Also, the Hokage fully realizes that there are not one, but two psychologically fragile Strategic Assets Of The Leaf on this team, and that the idea of having someone who could train Sasuke in the sharingan is pretty much torched unless he does something like call Itachi back home. For the moment, what he's looking for is someone who can put them back together again psychologically (as competent ninja first, and well-balanced people as much as can be managed after that), keep them from going rogue, and not let their training fall behind too far. He probably saw Sakura as someone of limited long-term value who's on the team because she's not all that important and therefore won't take up too much of sensei's time. He's going to have a hard time matching Kakashi's combo of Obito/Minako-driven personal loyalty, obsessive team-identification, hypercompetence, and understanding of broken, broken children, so perhaps it's time to take another strategy.
So what sort of a person does he want to hand them to?