Your theory about Anakin’s father(s) is interesting and makes a lot of sense. It’s definitely possible that both Palpatine and Plagueis were involved in his creation, either through the Force or through some kind of dark science.

If this is the case, it would explain why the Jedi were so hesitant to train Anakin. They knew that he was powerful in the Force, but they also knew that he was the product of the dark side. They were worried that he would eventually turn to the dark side himself.