If a new Jazz game were to be made, would it be from scratch or would it borrow elements from the unfinished JJ3 pre-alpha? For example: The story, the ideas, the world

Would any of the rocking music from the pre-alpha be used, if a new Jazz game were to be made? Cause you can't go past Alexander Brandon.

Would it be legal to create the Jazz Jackrabbit characters for use in other games? Eg: player models etc.