As far as love interests... Storm is cool and all, and a plus with the Afrikan background... but honestly at this point I'd rather they build up the New Orlean's girl: Monica Rambeau aka Spectrum (formerly known as Photon and Captain Marvel). In recent times, her and T'Challa were one of those coulda woulda shouldas and stayed dropping them hints to each other.
If Storm is gonna be stuck with the x-men in the books (they didn't want her with T'Challa in the books so they deaded the marriage and threw her to wolverine) and marvel can't use her in the movie-verse because of Fox... then I think Monica has the appeal and power set to take off mainstream wise, esp for black girls.