Unless, the babies are not seen receiving a name in ROTS, but we would still have the doubt about Anakin “the chosen one”'s children and why would they suddenly dissapear.
Well yeah… duh! 😄
If we don’t see the birth/death at all the ‘child’ could be anyone of about that age or she could have lost the child, we wouldn’t even know there were twins.
As for keeping the secrets. There are people who exist now who haven’t seen or care to see the Star Wars films and the prequels are billed as the first three episodes.
It would be nice to have a spoiler free prelude to the two and half good films in the OT and the ST which is currently okay. For kids to watch. Kids that like the sound of slowly fried Jedi face.