Put my vote down for skirmish rules.
I think a good way to handle it might be to put out a book that corresponds to each set, that one would purchase separately, if they were interested in the skirmish rules. That way, the cost/price of the miniatures themselves would be unaffected. Conversely, it could be as a card deck that simply contained one card for each miniature, again, in a seperate purchase pack. I would prefer a book though, along the lines of Wizards' Ultimate Missions series that they had brought out in conjunction with each of the first three Star Wars miniatures sets. The major bonus being that these books included a couple of maps, in addition to game variants and scenarios.
