On Sept. 25, Shonda Rhimes took over your television when ABC launched her back-to-back-to-back Thursday lineup of “Grey’s Anatomy” (8 P.M.), “Scandal” (9 P.M.) and the new “How to Get Away with Murder,” starring Viola Davis (10 P.M.). As the hit maker’s perfect recipe — sex, righteousness, and social-media know-how — becomes even more popular, we wonder if other networks will paint the next seasons of their own hits with the Rhimes brush.