I think all baseball contracts should be one-year and then all players become free agents. This would assumes that there will be no payroll cap or required minimum and no luxury cap. All teams can make offers to any player they want. Then baseball can divide all the teams into four conferences based on payroll. The rich play against the rich and the paupers play against other paupers. The could then have a four-team playoff series, but I don't see why they should. I think the finishing order of a playoff would consistently be:
1. Rich
2. Less Rich
3. Poor
4. Twins conference.