Android 17 and trunks

What if Android 17 listened and understood that he might not be stronger then imperfect cell? what if Android 18 was absorbed by cell instead of Android 17? What if Android 17 went back in time with trunks and cell was the reason why? What if 17 was a lot stronger then even goku and imperfect cell combined? What if 17 wanted to protect his sister? What if the others in the future still had to protect 17 from cell and most died because of that? What if 17 and krillin of the future got together instead of 18 and krillin?

(I'm changing some things that happened in this ok?! Don't judge me!)