kevin,
i am fine with any ideas you have since, obviously, you have played far longer and have more expirience running such events. i really wasnt concerned with any prizes or the like, just enjoying a game of mordheim. a league like you had mentioned with an end battle would be perfect. let me know if there is interest and if you want to set parameters yourself. if there are no prizes or entry fee, i feel like more would play and more people would be nonschalant over whether or not they were in first or last. but do whatever you feel is right to get a league started as i have the upmost faith in you being able to run one.