A black crusade sideline will definitely be a side thing, most certainly.   :-)<br/><br/>Naturally, players who don't have access to the Black Crusade rules will play as recurring villains from the game, statted up in Black Crusade.<br/><br/><br/>Another side game I'm considering is a Neon Genesis Evangelion game, but that's not something I can integrate into this game, so I'm less likely to do it unless I'm approaching burnout and need a diversion.