But they killed Fett again in the EU, With Lucas permission in the Boba Fett is dead comics. Only so they could have Mirta his daughter take over.
I wish Mara Skywalker would be in the movies but doubt that, it was Lucas decision to have her killed anyways in the EU because the choice Karen Traviss wanted was Luke and he said no.
Zahn was not even asked he created the character but Lucasfilm owns it.
A bit Spoiler-ish but those lousy ea books have been out for years.