The Dark Knight Rises spin-off movie The Huntress

I seen the ending of The Dark Knight Rises where Bruce Wayne and Selina Kyle are together I think there should be a spin-off movie that's called "The Huntress" a story about Bruce and Selina that are married and have a daughter name Helena (Kyle) Wayne that will come to her father's hometown Gotham City to follow in her father's footsteps and I think the person should be playing as The Huntress is Nina Dobrev