The 2020 Postseason now reads in part
"Collect flashbacks in the 2020 Postseason collection to earn stubs, xp and exclusive Player items in the World Series Program!"
Now I went back and confrimed that this wording has been change as it previously mentioned that exclusive players will be added later.
So to me this mean that the collection will be required to progress in the program much like to POTM or Players leauge program
I kind of figured it would be like this. The way programs have been this year it doesn’t surprise me at all. It will be interesting to see if they have more players than last years program/collection tiers which I think used vouchers