Alternate universe..(Naruto fanfic)

Naruto has lived in this world full of abuse for 12 long years. He had to suffer being an orphan. Being kicked out of the orphanage at the age of 4. And also failing the graduation exam 3 times. when he did finish the gradutation exam he got paired up with 2 other people. Sakura harono and Sasuke uchiha.
In another world. on the fatefull night of October 10th kushina gave birth to a healthy baby boy. But a guy In a mask snatched him up and took him away before either parent could do anything. 12 years later the still haven't found their baby boy..
Sasuke uchiha has went to hell and back. or that's what it feels like. He is determined to get revenge for his clan on his elder brother.The horriable elder brother who killed the entire clan. so once sasuke graduated from the accadamy. He set on his path.
In another world . on October10 kushina and minato weren't the only ones that lost their baby. Mikoto uchiha and fuguka lost their youngest son as well.
what happens when the boys finnaly get the 3rd hokage to let their team go on a c rank mission. All they had to do was protect the bridge builder. But everything changes when they are both fighting. sasuke is near death and Narutos seal slips. when that happens everything unfolds... read to find out what happens.
Disclaimer: Naruto is not mine. Just a fanfic