That wouldn't resonate with fans(and therefore the owners) nearly as much as having regular season champ World Series. Especially if there were a less selective Champions League-esque tournament afterwards. It gives incentive to be the very best(just like people like to reminisce about), while still keeping the interest of the other 25 teams who know before Memorial Day that their team can't reach that standard. And "relegate the worst teams to AAA" is an impossibility. AAA teams are the same franchises at a different level of play, not completely different entities that can be swapped. You can't crown two champions every year. That's completely unworkable. And if you say one playoff is for the championship and the other is just for fun, nobody will pay attention to the just-for-fun one. You see multiple champions in soccer with attention being paid to all of them. Part of that is because it combines leagues, but part of that is that people like rooting for their teams in tournaments. Offsetting the selected teams a year helps keep it from being considered just a consolation bracket, and if they wanted to incorporate NPB teams into it that'd be pretty cool as far as I'm concerned. You see it happen in college athletics too. People go nuts over championship week and bowl games even though the real tournament/title game happens afterward. If you wanted to give incentive to win that 16 team tourney with an auto-bid in the following year, that's a decent idea too. The point of the exercise is to solve conflicting desires. In baseball especially, people want to see deserved winners, and not make the 6 month season moot because of a poor game or two. Likewise, no one wants(or shouldn't want) to be so exclusive that we go back to having a 2 team playoff and world series in one, because 80% of baseball fans would lose interest by May. What I outlined is an attempt to satisfy both of those desires, and far from the only potential idea. Sorry, not seeing it, especially the part where you expect fans to embrace multiple champions every season. I can't think of an American team sport that uses that model, on any level. Your solution creates more problems than it solves. JMHO of course. This would only work if there were 4 or 5 leagues that never interacted with each other except for this tournament. And, fans would still watch it with passive interest.