Do you guys think that Itadori could have been born from a Death Painting Womb? There are 9 of them and we only know 3 of them. (Or maybe he's just the first child of the woman who had those death painting wombs instead of being one of the wombs)
Maybe he is half human half curse? His parents are unknown, he has superhuman strength, enhanced durability, speed and reflexes PLUS he can control Sukuna, PLUS the random flashbacks that Todou and Choso got when they fought him: the "past events that never happen", that might be a special technique that he happened to activate subconsciously in order to survive or something.
He just seems a bit special you know....
Tell me what you guys think :D