Since my military retirement, I've been debating how to bring some of my wargame designs into publication. Several of them are quite mature, and what I particularly like about them is the ease of setup and rapidity of play. These were developed to be used to study a conflict area during the lunch break, and they worked very well.
I think they would hit the sweet spot between playing a standard card game and something a little more strategic and elaborate.
One issue is the topic: contemporary/future conflicts. These were designed as teaching tools, and the general public may not groove to them. However, yesterday I realized that I could probably adapt the core system into a more popular topic, say the various civil wars in England (obviously including the Wars of the Roses).
A big advantage of this approach is that it has huge growth potential. I've already built multiple scenarios, which gives the game some "legs" in term of future expansions.
Now if only I could convince my old unit to let me use their plotter to make the maps...