I love the idea of a premiere league, relegation, and higher stakes/prize scenarios. That said having a 5 season cycle that resets every 5 seasons would seem to break a lot of the dynasty aspects of the game (why would anyone spend on HS prospects for example, or any prospects/draftees in seasons 3-5 of the cycle). I think a better idea would be an annual relegation and perhaps a second world to move the top/bottom X number of teams up and down or off of the bottom league