I really don't know what you guys are planning for this, but here is my thoughts: There should be some way to challenge a gym leader for their rank. In the manga and Anime it was made clear that trainers who wanted to be gym leaders only had to beat the leaders to take over their spot. There should be limits for it (The challenger needs so many posts and so many months active), but I think it would be nice for people who envy gym leaders to get a shot at it. Also if a gym leader is feeling that Gym leading is getting tiresome they could pass it off to someone else quickly. I know I would enjoy having the chance to become a gym leader. Just something to think about for you guys...