The change in Anakin's dreams...
The second dream Anakin has about Padme is different from the first(duh 😛 ), but its also exactly what ends up happening, all the way down to Kenobi's dirty clothes. While the first dream was completely different, no Obi and she even says Anakin(I think).
What Im wondering, does Anakin do something between the dreams that changes what eventually happens? Granted Padme still dies, but maybe Anakin doesnt fall and become Vader.