It's probably not ALL gen 4 but I wouldn't be surprised to see the starters, and some of the early ro🍷ute pokemon (Luxray, Staraptor, Krikitune, Biberel) along with stuff like Lucario and Darkrai. With the 3 packs perhaps featuring Dialga Palkia, and Giritina, with Arceus taking the place of the secret-rare mew you get for getting all the cards.

Though, perhaps they WILL add all of because it gives them a diverse pool of gen 2 and 3 pokemon as w🍌ell.

ꦫEither way I'll still keep my hopes up that at some point we get a pack with the 3 Regis 🐲on the front, each with 2 regis each