I remember Back in Board Game days, we would do a Hi/Low format (APBA Baseball, but would work here). Specify two seasons, lets just say 2000-2001, and 2014-2015. Best record team from 2000-01, and the worst team from 2014-15 combine, and the owner selects any 12 players from the resulting mash up. Wouldn't work for a progressive unless you did a twelve team hi-lo from a single season, and then progress the league by year. Advantage of the twelve team league would be you could do a progressive, and easier if you wanted no clones, and a ww.