Yeah! So every league will have the opportunity (before the season starts) to enable the playoffs. However, the playoffs will be a head-to-head points matchup following the rules of head-to-head here - you can pick between FanGraphs Points or SABR Points for your playoffs, and there will be 2 SP slots and 1 C, etc.
All leagues will have the option of playing a season-long roto or points league and have the playoffs kick in in September. Kind of a final sprint after the summer marathon.