Johnny Ringo said:
This will surely end in tears. Fett is popular because he is mysterious.
But that's what Kasdan's wants to do. His idea is that at the start of the film someone who Boba Fett is hunting kills him and takes his armour. You never see his face, there by doing away with the whole prequels thing and any knowledge of the character.
It would be a great way to start the film.