I am developing a miniseries of what I expect to be about 10 episodes. The series as a whole is titled "The Ghosts of War".
Part I of the series, "Dust To Dust", will be out by this weekend. I've more or less finished it already and will be polishing it up a bit before publishing. It's a fairly short and straightforward mission, but it sets the stage for the rest of the series.
Part II will be titled "Extraordinary Rendition". I'm still in the process of writing up the treatment and outline of this mission, but I already have a good idea of how it will unfold. It will be a good deal longer and more complex than "Dust To Dust", as I take you deeper and deeper into an audacious plot against the Federation.
In the big picture of the grand story arc as a whole, I do have an endgame in mind, and a general idea of how I will arrive at said endgame; it's just a matter of fleshing things out.