However, I agree that two segments is plenty; one for films and one for the TV series. And if the film segment needs to focus on whatever movie is being reissued in theatres or on home video, so be it. Likewise the TV segment should focus on high-demand characters but both segments need to continue to offer main characters for those late to the collecting game. Whether that's done as a catch-up multi-pack at retail or a "best of" wave exclusively through Hasbro.com, new consumers really need an easy way to start collecting without having to resort to the secondary market.
One thing I'd like to suggest, on the off chance that this "19 figures per year" ends up being the trend for the next five or six years; stick to the show! There are plenty of new characters or variants of existing characters that will sell just fine without resorting to "off camera" shenanigans like "Cold Weather Plo Koon" and such.