Why dont you think "the prophet's life and fiction dont mix well"? Have you read Kamran Pasha's "Mother of the believers"? Its a fiction novel written using Aisha as a narrator. It's historically accurate, written in novel form.

my idea is pretty innovative. My agenda is also to bury all the sunni and Shia sects(non-muslims too) by using prose to educate the reader about what really went down after the Prophets death; How Ali was really the heir; and more.

what im scared of is working hard for this project and not get a single sale. Which I believe will happen.