Last year, Epoch tried their hand at a big current set with a Pacific League set. Granted, that was much smaller than this set, but it was a start. Now, Epoch has a full set covering all twelve teams for the first time since 2000, I believe. In 2000, Epoch issued a pack-based sticker set similar to Panini's stickers of the 1980s and Topps' stickers of the past decade or so. And I believe this is Epoch first comprehensive NPB set in nearly 20 years.
The common insert card is called Silver Foil, which you can see on the front and back. The set is divided into subsets. Silver Foil cards come about 1:2.5 packs, and there are 60 cards in a set - five per team.
I'm still looking for my base set, but I definitely want a complete set. Hopefully one shows up at a good price soon!