I think we could target both Privateer (have it so that when your ship shows up at the same nav point as another you spawn the other player) or the x-wing and tie-fighter series.

One problem I'm noticing is that people are much more interested in one-click play (which means using the Open Source RetroVega space game, which I checked in at https://github.com/danielrh/wcmulti/tree/master/retrovega ) rather than going through the trouble to dig up the installer and get the full year 1990 retro experience with Wing Commander. I worry that making older games work is not worth the time it takes if no one tries it.