Mets & Braves tied for first place.
Division winner gets a bye.
Runner-up hosts (possibly the Padres or Phillies) in a best-of-three series played on three straight days.
One calculation teams will have to make is whether they can structure their rotations to pitch their #1 & #2 in the first two games of that three-game series, or whether they need them for division/playoff positioning in the final few days.
If the Phillies are "in" but hovering between #2 and #3 spot, you rest/save guys in the final series, right?